Bootstrap Switched Reluctance Motor Controller Based on SoC and IGBT

Abstract

The invention relates to a brushless double closed-loop switched reluctance motor controller with a position sensor, applicable to rail-free electric traffic tools and rail-bound electric traffic tools. A digital logic circuit and a micro control unit (MCU) are integrated in a chip of a system-on-chip, and the hardware circuit of a digital part is designed into software so as to achieve the purpose of simplifying a digital hardware circuit. Separated IGBT power electronic power devices are adopted, various complex electric drive loads are designed in a personalized way, and under-voltage, over-current, overheating and short-circuit protection circuits are designed in a tailored way from an overall perspective of the switched reluctance motor controller. Counter electromotive force produced by a switched reluctance motor (SRM) in operation is better converted by a bootstrap circuit into energy for motor operation, so that the performance of the switched reluctance motor controller is improved from the aspects of safety and stability.

Description

Technical field [0001] The technical invention relates to a brushless double closed-loop switched reluctance motor (SRM) control system with a position sensor for a trackless electric vehicle and a tracked electric vehicle. Among them, trackless electric vehicles include electric vehicles, electric cars, electric buses, etc.; tracked electric vehicles include subways, high-speed rails, and bullet trains. Background technique [0002] Under the pressure of environmental pollution, green transportation has become the main theme of people's travel, travel, transportation and other tools. In order to adapt to this change in the living environment, electric transportation has become an ideal choice for people. Because the switched reluctance motor (SRM) has a simple and sturdy structure, easy maintenance, large torque and low current at start-up and low speed, wide range of high-speed constant power, and strong fault tolerance, and the rotor of the switched reluctance motor (SRM)...

AI Technical Summary

Problems solved by technology

[0003] Current switched reluctance motor controllers generally adopt a layout in which digital logic chips or programmable logic devices (CPLDs) are separated from microprocessors (MCUs). The patent No. 2012103462111 titled "A Switched Reluctance Motor Controller Based on Synchronous Rectification Technology" uses a layout method in which the digital logic chip and the microprocessor are separated to process the signal and control of the switched reluctance motor controller. The separated layout makes the hardware circuit structure of the switched reluctance motor controller complex, and the ability to resist external interference is not strong, which causes a lot of inconvenience to production and maintenance

Since the power module IPM has built-in protection circuits such as undervoltage, overheating, overcurrent, and short circuit, it can avoid damage to power devices caused by system failures, and has a high degree of integration, which can reduce the workload of product design. The power electronic power device of IPM is directly used in the motor controller. For example, the patent No. 2011102827477 issued by the People's Republic of China was published on January 25, 2012, and the name is "A Universal Power Conversion of Switched Reluctance Motor Based on IPM". ", but the switched reluctance motor (SRM) faces a variety of driving loads, which will produce a switched reluctance motor (SRM) with different rated power or stator and rotor poles. However, the IPM is the upper bridge arm The half-bridge power electronic power device integrated with the lower bridge arm has limited models and cannot flexibly cope with the power dragging of various complex loads. Moreover, the protection circuit in the IPM is oriented to the protection of the integrated IGBT, not from the entire switch Starting from the design of the reluctance motor controller, the protection circuit of the entire controller is reasonably arranged, and the price of IPM is expensive

When the current switched reluctance motor (SRM) controllers generally deal with the back electromotive force of the switched reluctance motor (SRM) stator winding, some directly consume the back electromotive force through the bootstrap capacitor, and some do not consider the back electromotive force It is alternating current, which is directly fed back to the power supply, causing system instability

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