武蔵野通工 List of Products and Services

"Are you having trouble selecting a transformer for your LLC power resonant circuit?" ◆ The variation in the transformer's leakage inductance is large. ◆ The variation in the transformer's magnetizing inductance is large. ◆ The output is not as expected under heavy load. "Musashino Electric has various know-how to solve your concerns!" ★ Based on abundant experimental data obtained from many implementation results, we will commit the transformer's parameters to meet your specifications! ★ With our unique winding method, we can achieve low tolerance for leakage inductance, magnetizing inductance, and switching frequency to your specified values. ★ Thanks to our extensive inventory of custom winding materials such as litz wire and copper foil, we can provide quick responses from prototyping to delivery. ◎ We will design and develop custom transformers suitable for converters for LLC power supplies that clear various challenges! If you have any questions, please feel free to contact us.

• transformer

"Are you having trouble selecting transformers or choke coils in the high-frequency range?" ◆ High heat generation and losses ◆ Low magnetic coupling, large leakage flux, and leakage inductance ◆ Unable to select the configuration of litz wire (stranded wire) ◆ Cannot achieve DC superimposition characteristics "Musashino Electric has various know-how to solve your problems!" ★ Measures against skin effect in the high-frequency range Suppression of current distribution distortion through subdivision of conductors using litz wire ★ Measures to improve magnetic coupling Significant improvement in magnetic coupling through our unique method of "sandwich winding" ★ Proposal for litz wire configuration Based on abundant experimental data, we propose an optimal balance of litz wire (wire diameter, number of twists, number of turns) in terms of efficiency vs. heat generation. ★ Proposal and grinding processing of magnetic materials suitable for the frequency range We propose magnetic materials with suitable high-frequency characteristics such as ferrite, dust, and amorphous materials. Achieve low tolerance inductance values through gap processing with our uniquely developed magnetic material grinding equipment. ◎ We design and develop custom transformers and choke coils suitable for various power conditioners and motor drive inverters that meet high-frequency high current requirements, overcoming various challenges!

• transformer

We offer custom-made transformers and reactors. We support you from the specification consideration and design stage, and can respond to a wide variety of customer requests, including the application of international safety standards and the reproduction of other companies' off-the-shelf products. Please feel free to contact us with your requests. 【Features】 ■ Custom-made to match usage conditions and product specifications ■ Support from transformer selection and capacity calculation to implementation ■ Comprehensive support from design compliant with international safety standards to standard application ■ Proposals for reproduction and improvement of other companies' off-the-shelf products ■ Flexible response to small lot and prototype projects *For more details, please contact us.

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Are you having trouble selecting transformers that meet various standards? - Unable to obtain transformers compliant with IEC standards for medical devices - Cannot find a manufacturer that can handle everything from design to certification - Unsure which transformers to choose for medical devices - Need transformers with low leakage current - Want to make products more compact ★ The NCW transformers from Musashino Tsukou are ideal for medical device power supplies, as they are 'compliant with IEC standards 60601-1 and 61558-1, featuring low leakage current, compact, lightweight, and thin space-saving designs,' solving your concerns! ★ Numerous successful implementations as compact step-up transformers for medical X-ray generators! We can provide transformers suitable for Cockcroft-Walton circuits for high-voltage power supplies! 'Musashino Tsukou offers one-stop in-house support from design to mass production!' ■ We propose solutions to our customers through hearings at the design stage. ■ With the technical expertise cultivated over 60 years, we realize your ideal products. ■ Our in-house mass production allows us to deliver products to you in a short lead time. If you have any questions, please feel free to contact us.

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We would like to introduce our "DC Reactor (EI Core Type)." We offer two types of circuit voltages: 200V series and 400V series. The inverter capacity ranges from 0.4kW to 15kW, and the insulation class is Type F. Please feel free to consult us when you need assistance. 【Lineup (Excerpt)】 ＜200V Series＞ ■DCR-L0.75E ■DCR-L1.5E ■DCR-L2.2E ■DCR-L3.7E ■DCR-L5.5E ■DCR-L7.5E *For more details, please refer to the PDF document or feel free to contact us.

• transformer

We would like to introduce the "DC Reactor (Cut Core Type)" that we handle. It is suitable for various power conditioners and motor drive inverters, and is available in Super E-Core and amorphous specifications. This reactor is designed for harmonic mitigation and power factor improvement, and we offer models for both 200V and 400V systems. 【Specifications】 ■ Circuit Voltage: 200V Series / 400V Series ■ Inverter Capacity: 0.4kW to 55kW ■ Insulation Class: Class F *For more details, please refer to the PDF materials or feel free to contact us.

• Other electronic parts

We offer two types of DC reactors: cut core type and EI core type. They have received high praise from many customers for applications such as harmonic countermeasures and power factor improvement. Both the cut core type and EI core type are available in two voltage classes: 200V and 400V. We can also provide vertical specifications according to needs, and they can be customized to low-loss amorphous specifications. We have many models available according to the inverter capacity (kW). We can provide various DC reactors tailored to your requirements. In addition to standard DC reactors, we also offer various AC reactors, three-phase specifications, amorphous cores, and custom super E core specifications, so please feel free to consult with us. We will be exhibiting custom products at the Techno Frontier "Power Supply System Exhibition" held from July 26 to 28! We look forward to your visit. 【Products Offered】 ■ DC Reactor (Cut Core Type) - Circuit Voltage: 200V series / 400V series - Inverter Capacity: 0.4kW to 55kW - Insulation Class: Class F ■ DC Reactor (EI Core Type) - Circuit Voltage: 200V series / 400V series - Inverter Capacity: 0.4kW to 15kW - Insulation Class: Class F

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This catalog is a product catalog for the products handled by Musashino Doko Co., Ltd. It includes a variety of items such as "power transformers," "control transformers for distribution boards," "reactors," and "switching transformers." ■ Looking for a transformer and reactor manufacturer that can handle bulk orders... ■ Wanting custom solutions with short lead times instead of existing products... We have the know-how and technology to solve many of your concerns. We provide high-quality transformers backed by reliable technology, from design to mass production, all in a one-stop service, so please feel free to contact us. *For those interested, we will send a comprehensive catalog by mail, so please feel free to download it or contact us! [Contents] <Power Transformers> ■ Board-mounted transformers ■ Equipment installation transformers ■ NCW transformers ■ OI transformers ■ Cut core transformers *For more details, please refer to the PDF materials or feel free to contact us.

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This catalog is a comprehensive catalog of products handled by Musashino Doko Co., Ltd. It includes a variety of items such as "power transformers," "control transformers for distribution boards," "reactors," and "switching transformers." We provide high-quality transformers backed by reliable technology, from design to mass production, all in a one-stop service. We invite you to read through it. *For those who wish, we will send the comprehensive catalog by mail, so please feel free to download it or contact us! [Contents] <Power Transformers> ■ Board-mounted transformers ■ Transformers for equipment installation ■ NCW transformers ■ OI transformers ■ Cut core transformers *For more details, please refer to the PDF materials or feel free to contact us.

• Transformers

We would like to introduce a case of a flyback transformer with controlled inductance tolerance. In the development of switching power supplies, we received a request to reduce the inductance variation of the flyback transformer and to conduct early practical evaluations of the transformer. Typically, inductance adjustments are made using processed products from ferrite core manufacturers or space materials, but there are challenges regarding delivery times and accuracy. However, our company, which owns grinding processing equipment, has overcome these challenges and was able to provide prototypes in a short time. Additionally, this transformer can accommodate sizes from EPC17 to large cores. 【Custom Product Specifications】 ■ Size and Dimensions: EER9.5 to PQ100 ■ Applicable Standards: UL1446 ■ Insulation Type: Class B ■ Products Used: Industrial equipment, medical devices, measuring instruments *For more details, please refer to the PDF document or feel free to contact us.

• transformer

We would like to introduce an example of a slim OI transformer that complies with DIN standards. We received a request from a customer who wanted to adopt a power transformer that fits within a 1 DIN size but was struggling with the height limitations of existing slim transformers. In response, our company further customized the well-regarded OI transformer, known for its slim design under 100W, to create a transformer that fits the customer's product. By utilizing the dead space of the O-shaped iron core to draw out taps, we achieved a slim design and size reduction. 【Custom Product Specifications】 ■ Size and Dimensions: 73mm × 50mm × 35mm ■ Voltage Specifications: Primary Voltage 100–200V / Secondary Voltage 100–200V ■ Capacity: 8–156VA ■ Applicable Standards: JIS-C6436 ■ Insulation Type: Class E ■ Products Used: Measurement equipment, disaster prevention equipment *For more details, please refer to the PDF document or feel free to contact us.

• transformer

We would like to introduce a case of a duct-internal transformer with suppressed temperature rise. After completing the housing and circuit design, we received a request to suppress the temperature rise of the transformer, as the temperature rise during aging slightly exceeded the specifications without changing the installation space and other conditions. In response, we carefully discussed the storage space for the transformer and installed ventilation ducts within the winding that remained within the allowable range. As a result, in conjunction with the orientation of the air-cooling fan, we achieved a temperature rise suppression of △8°C compared to the initial value, reducing the temperature class by one rank. 【Custom Product Specifications】 ■ Size and Dimensions: 200mm × 160mm × 140mm ■ Voltage Specifications: Primary Voltage 100V / Secondary Voltage 200V ■ Capacity: 2000VA ■ Applicable Standards: IEC60601-1 ■ Insulation Type: Class F ■ Remarks: Inrush Current below 180A ■ Product Used: Medical Equipment *For more details, please refer to the PDF document or feel free to contact us.

• transformer

We would like to introduce an example of a reactor for inverters that has been designed to counteract salt damage. We received a request to develop a marine equipment reactor that incorporates measures against salt damage and vibration for outdoor-installed inverters. Our company has achieved environmental protection and durability through the use of a SUS frame and epoxy resin coating, while also realizing advantages in cost and compactness. Additionally, by implementing salt damage countermeasures, we were able to meet IP standards. 【Custom Product Specifications】 ■ Size/Dimensions: 125mm × 80mm × 55mm ■ Voltage Specification: 280–380V ■ Insulation Type: Class B ■ Remarks: Inductance: 1.8mH DC15A ■ Product Used: Marine Equipment (Inverter for Fish Aggregation Light) *For more details, please refer to the PDF document or feel free to contact us.

• inverter

This catalog introduces the "Control Transformers for Distribution Boards" that we handle. We offer a wide range of "Single-phase Transformers" and "Three-phase Transformers" categorized by capacity and insulation type. Additionally, we have included characteristic tables (single-phase/three-phase) and connection diagrams. We provide various types of transformers, from surface-mounted types to three-phase transformers, tailored to meet our customers' needs. 【Product Lineup (Partial)】 <Single-phase Transformers> ■OP1P-50 ■OP1P-100 ■OP1P-300 ■OP1P-500 *For more details, please refer to the PDF document or feel free to contact us.

• Transformers

This catalog introduces the "Power Transformers" handled by our company. We offer a rich lineup including "PCB Mount Transformers" with an insulation class of E, "Equipment Installation Transformers" of classes A and B, and "NCW Transformers (horizontal)/(vertical)" of class B. In addition to standard products ranging from 50VA to three-phase 15kVA, we also accept orders for new designs and custom solutions for leakage transformers and other special transformers. 【Product Lineup】 ■ PCB Mount Transformers ■ Equipment Installation Transformers ■ NCW Transformers (horizontal)/(vertical) ■ OI Transformers ■ Cut Core Transformers (horizontal transformers) *For more details, please refer to the PDF document or feel free to contact us.

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This document introduces the main materials required for transformers. For the iron core, it features "oriented silicon steel sheets" and "non-oriented silicon steel sheets," and for the insulating paper, it includes characteristics of "pressboard" and "polyester film." Please take a moment to read it. 【Contents】 ■ Iron Core ■ Insulating Paper ■ Lead Wires ■ Magnet Wire (Copper Wire) ■ Winding Technology (Edgewise Winding of Rectangular Wire, Litz Wire) ■ Winding Technology (Three-Layer Insulated Wire) *For more details, please refer to the PDF document or feel free to contact us.

• others

This catalog introduces the "reactors" that our company handles. We offer a wide range of products, including "AC reactors" with circuit voltages of 200V and 400V, as well as "DC reactors (EI core type)/(cut core type)" and "power inductors." In addition to standard DC reactors, we also welcome inquiries about new designs and developments for three-phase AC reactors, amorphous core, and Super E core specifications. 【Product Lineup】 ■ AC Reactors ■ DC Reactors - EI Core Type - Cut Core Type ■ Power Inductors *For more details, please refer to the PDF document or feel free to contact us.

• Other electronic parts

This catalog introduces the "Switching Transformers" that our company handles. We offer a wide lineup categorized by size, including "PQ type," "EE/EI type," "EE/EI/EER type," and "EER type." We also accept new design development and custom orders based on shape, pin count, and more. Please use this for selecting products. 【Lineup】 ■ PQ type ■ EE/EI type ■ EER type ■ EPC/SMD type ■ EPC type *For more details, please refer to the PDF document or feel free to contact us.

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This document introduces the basic technology of transformers. It explains the types of transformers, types of reactors, classification based on transformer structure, types of insulation for transformers, constituent materials of transformers, main types of transformers and their characteristics, and various inspection methods. For any inquiries regarding transformers, please contact Musashino Tsukou, which has been in business for 60 years. 【Contents (excerpt)】 ■ What is a transformer ■ Types ■ Principles ■ Classification based on transformer structure ■ Types of insulation for transformers *For more details, please refer to the PDF document or feel free to contact us.

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• Transformers

This document introduces the materials used in transformers. It includes various shapes and materials such as "iron cores," "winding wires (magnet wires)," "insulating materials," and "lead wires." Each section explains the characteristics and further details about the types of materials. We encourage you to read it. [Contents] ■ Iron Core ■ Winding Wires (Magnet Wires) ■ Insulating Materials ■ Lead Wires ■ Insulating Tubes ■ Varnish Impregnation *For more details, please refer to the PDF document or feel free to contact us.

• transformer

We conduct intermediate inspections, final inspections, and shipping inspections for transformers. In the "withstand voltage test," we check whether the insulation between the test subject and other parts maintains appropriate insulation capability. In addition to this, there are other tests such as "inter-layer dielectric strength test," "insulation resistance test," and other items tested during prototype production based on the validity of the design and customer requests. 【Inspection Contents】 ■ Withstand Voltage Test ■ Inter-layer Dielectric Strength Test ■ Insulation Resistance Test ■ No-load Current (Excitation Current) / No-load Loss (Iron Loss) ■ No-load Voltage *For more details, please refer to the PDF document or feel free to contact us.

• transformer

This document introduces the main types and features of transformers. It includes standard and low-cost "cut core transformers," as well as "cut core type transformers," "OI type transformers," and "NCW type transformers." Please take a moment to read it. 【Featured Products】 ■ Cut core transformers (EI core, cut core, etc.) ■ Cut core type transformers ■ OI type transformers ■ NCW type transformers *For more details, please refer to the PDF document or feel free to contact us.

• transformer

This document introduces special items related to transformers that may become problematic depending on customer requests or applications. When the frequency increases, attention must also be paid to the materials selected. It includes necessary measures such as "harmonic countermeasures," "inrush current countermeasures," and "leakage flux countermeasures." Each countermeasure is explained, so please take a moment to read through it. [Contents] ■ Inrush current countermeasures ■ Leakage flux countermeasures ■ Harmonic countermeasures *For more details, please refer to the PDF document or feel free to contact us.

• transformer

Transformers are reliable and long-lasting devices, but prolonged use can lead to deterioration of the winding insulation and insulating materials due to temperature effects. They are also significantly affected by the ambient temperature in which they are used. To ensure safe long-term use, temperature rise limits are established based on the insulating materials used, and each type of insulation material has its own specified temperature rise limit. The maximum allowable temperature, under rated conditions, is the temperature rise limit of the insulation type plus the reference ambient temperature (40°C). When installed and used in control panels, it is generally necessary to consider that the internal temperature rise of the panel can be 5 to 10°C. *For more details, please refer to the PDF documentation or feel free to contact us.

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This document introduces the types of transformers and reactors. It also includes the types designed and manufactured by Musashino Electric Works. Additionally, it provides a detailed explanation of the classification of single-phase and three-phase using photographs. Please take a moment to read it. [Contents] ■ Types of transformers ■ Types of reactors ■ Classification of single-phase and three-phase *For more details, please refer to the PDF document or feel free to contact us.

• transformer

I will introduce the classification of transformers based on their structure. Transformers are constructed using a combination of a core and windings. "External core transformers (including wound core types)" have two or more magnetic circuits surrounding the windings. They have an appearance where the core is located outside the windings. "Internal core transformers" have a single magnetic circuit with windings arranged around it. They have an appearance where the core is located inside the windings. *For more details, please refer to the PDF document or feel free to contact us.

• transformer

I will introduce the principles of a transformer. A transformer consists of a core made of iron and two independent windings. The winding connected to the power source is called the primary winding, and the winding connected to the load is called the secondary winding. When an alternating voltage is applied to the primary winding (P), a current flows through it (referred to as the excitation current), which generates a magnetic flux within the core. This change in magnetic flux induces a voltage in the secondary winding (S), and the induced voltages V1 and V2 in the primary and secondary windings are determined by the ratio of the number of turns in the primary winding N1 to the number of turns in the secondary winding N2. When a voltage is applied to the primary winding, a voltage proportional to the number of turns is induced in the secondary winding, and by changing N1 and N2, the ratio of the primary voltage to the secondary voltage can be arbitrarily altered. *For more details, please refer to the PDF document or feel free to contact us.*

• transformer

We will be exhibiting at the "New Manufacturing and New Services Exhibition for Small and Medium Enterprises." Date and Time: December 7 (Mon) 11:00-17:00 December 8 (Tue) 10:00-17:00 December 9 (Wed) 10:00-16:00 Location: Tokyo Big Sight, A Hall, Aomi Exhibition Building Booth: M41 [Introduction of Main Exhibits] Through the development of a super high-precision ferrite core automatic grinding device, we have made it possible to achieve an inductance tolerance of ±5% in mass production. [Product Introduction] ■ High-frequency transformers, reactors for harmonic countermeasures Compatible with large current and high-frequency power supply equipment Many products using litz wire and copper foil winding have been delivered. ■ OI Transformers Thin transformers with excellent leakage characteristics and temperature characteristics They have an advantage in installation space compared to conventional EI types. ■ NCW Transformers Significantly reduce iron loss through our unique no-cut core winding technology and the use of oriented silicon steel sheets Greatly contribute to reducing operating costs for energy-efficient operation Compliant with medical standards and international safety standards. *For more details, please refer to the PDF materials or feel free to contact us.

• transformer

We have a wealth of delivery experience with products using Litz wire and copper foil winding that are compatible with high current and high frequency power supply equipment. We have also introduced automatic grinding equipment for ferrite cores, and we can meet the user's needs for inductance variation.

• Inductor Coil

By combining a rectangular-shaped core and a strip-shaped core, we have achieved a slim design with excellent leakage and temperature characteristics. It also has an advantage in installation space compared to the EI type. 【Products Available】 ■ Compact VA Series *For more details, please refer to the PDF document or feel free to contact us.

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• Transformers

The unique no-cut core winding technology and the adoption of directional silicon steel strips significantly reduce iron loss, greatly contributing to energy savings and the reduction of operating costs. It also complies with medical standards and international safety standards. 【Features】 ■ Fully utilizes core performance ■ No cuts or gaps in the core ■ Uses split bobbins ■ Improves work efficiency ■ Stabilizes quality ■ Reduces manufacturing costs *For more details, please refer to the PDF document or feel free to contact us.

• transformer

Due to the distributed GAP, there is an advantage in terms of DC superimposition characteristics and heat generation countermeasures.

• Inductor Coil

We have a proven track record of delivering various products, including dental equipment and pet X-ray devices, to many users.

• X-ray inspection equipment

■MTR-0.4 ■MTR-0.75 ■MTR-1.5 ■MTR-2.2 etc.

• Inverter

This is a custom transformer product from Musashino Electric Co., Ltd., which designs, manufactures, and sells various types of transformers, reactors, and power supply units. In addition to standard products ranging from 50VA to three-phase 50kVA, we can also accommodate leakage transformers and other special transformers. We provide products with reliable "quality, price, and delivery time." 【Products Offered】 ■ Standard Single-Phase Transformers ■ Standard Three-Phase Transformers *For more details, please refer to the PDF document or feel free to contact us.

• transformer

Musashino Doko Co., Ltd. designs, manufactures, and sells various types of transformers and power units. We handle a wide range of products, including power transformers, high-frequency transformers, special transformers, and reactors for harmonic mitigation. We strive to meet the diverse needs of our users, so please feel free to contact us with your requests. 【Products Offered】 ■ Power Transformers ■ High-Frequency Transformers ■ OI Transformers ■ NCW Transformers ■ Reactors ■ Power Inductors *For more details, please download the PDF or feel free to contact us.

• transformer