Littelfuse 電機驅動和軟啟動器解決方案

Littelfuse和IXYS工業電機驅動和軟啟動器解決方案提供保護和控制元件，有助於提高工業應用中的電機壽命和能源效率。變頻器 (VFD) 透過改變電機輸入電壓和頻率來控制交流電機速度和扭距。軟啟動器為電機提供平穩的啟停操作。變頻器和軟啟動器的工作原理相同，但其採用不同的架構及服務不同的應用。變頻器可以透過編程並基於流量、壓力和其他因素來改變電機轉速。變頻器用於升降機、手扶梯、破碎機、攪拌機等。當電機達到全速時，軟啟動器會被承包商過載電路繞過。軟啟動器非常適合輸送機、泵和其他皮帶驅動型應用。這些Littelfuse和IXYS電機驅動和軟啟動器符合全球和北美安全標準。

VFDs & Auxiliary Power Supplies

The VFD lineup features fuses, diodes, and MOVs that protect equipment against various surges, including overload, short-circuit, transients, and lightning. The rectifiers convert AC line voltage to DC, while the IGBTs limit the DC bus voltage by switching the braking energy to a resistor. The IGBTs act as power inverters, and the NTC sensors indirectly measure the temperature of the power inverter semiconductor switches.

1. AC Input Protection - Fuses and Fuseholders 5. Inverters - Semiconductor Fuses

2. AC Input Protection - MOVs 6. Inverters - IGBT Modules, SMPDs, NTCs, and TVS Diodes

3. Rectifiers 7. Auxiliary Power Supplies

4. Brake Choppers 8. Switches

Soft Starter Topology

The soft starter products feature fuses, MOVs, SCR modules, thermistors, and switches. The fuses are designed for the supplementary protection of diodes, SCRs, IGBTs, and more. The SCR modules control the application of supply voltage to the motor, while the NTC sensors indirectly measure the temperature of the power inverter semiconductor switches. The MOVs protect equipment from damage caused by lightning-induced surges or harmonic voltage disruptions from the power line.

1. AC Input - AC Fuses 4. Phase Control - NTCs

2. AC Input - MOVs 5. Phase Control - Switches

3. Phase Control - Dual and Discrete SCRs, and Stack