Integrated power conversion circuit

Abstract

The invention belongs to the technical field of motor control, and particularly relates to an integrated power conversion circuit. The invention aims to provide an eight-output integrated secondary power conversion circuit. The integrated power conversion circuit has a closed-loop adjustment function, and a switching integrated secondary power conversion circuit is adopted to supply power to multiple power sources required by a power driving circuit. The integrated power conversion circuit comprises an input filter circuit, a PWM chopper circuit, a regenerative energy absorption circuit, a voltage feedback circuit, a transformer circuit, and a rectifier output circuit, wherein the input filter circuit, the regenerative energy absorption circuit, the transformer circuit and the rectifier output circuit are connected in sequence, and the transformer circuit, the voltage feedback circuit and the PWM chopper circuit are connected in sequence to form a closed loop.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to an integrated power conversion circuit. Background technique [0002] Nowadays, with the maturity and progress of power electronics technology, the functions of motor control drivers are becoming more and more powerful, the design of power drive power conversion circuits is more complex, and the requirements for secondary power supply are also getting higher and higher. In the selection of power devices, IGBT is more common. The traditional design idea generally directly selects the power module to complete the secondary power conversion of all power drive power supplies, but the control drive IGBT requires 4 groups (8 channels) of independent +15V and -8V power supplies , if the power module solution is selected, a power module needs to be selected for each drive power supply, which will occupy a large space on the PCB layout, which cannot meet the needs of pro...

AI Technical Summary

Problems solved by technology

In the selection of power devices, IGBT is more common. The traditional design idea generally directly selects the power module to complete the secondary power conversion of all power drive power supplies, but the control drive IGBT requires 4 groups (8 channels) of independent +15V and -8V power supplies , if the power module solution is selected, a power module needs to be selected for each drive power supply, which will occupy a large space on the PCB layout, which cannot meet the needs of product miniaturization, and the cost of the power module is relatively high

[0003] The use of a transformer-based switch-type regulated power supply conversion circuit can effectively complete the integrated design of the circuit and greatly reduce the size and cost of the driver. However, in the past, the output voltage of the transformer-based power circuit fluctuated greatly, which could not meet the functional requirements of the motor control driver.

Images