Permanent magnet synchronous motor drive control system and method of cascaded multilevel converter

A permanent magnet synchronous motor, drive control technology, applied in the direction of single motor speed/torque control, irreversible DC power input conversion to AC power output, etc., can solve the problem of low output power quality, many output harmonics, and affecting new Energy electric vehicle safety and comfort and other issues, to achieve the effect of improving the quality of output power and reducing output harmonics

Active Publication Date: 2014-01-22
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a cascaded multi-level converter to solve the problem that the traction motor on the existing new energy electric vehicle has many output harmonics and the output power quality is low, which further affects the safety and comfort of the new energy electric vehicle. Permanent magnet synchronous motor drive control system and its control method

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  • Permanent magnet synchronous motor drive control system and method of cascaded multilevel converter
  • Permanent magnet synchronous motor drive control system and method of cascaded multilevel converter
  • Permanent magnet synchronous motor drive control system and method of cascaded multilevel converter

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specific Embodiment approach 1

[0046] Specific implementation mode 1. Combination figure 1 Describe this embodiment, the permanent magnet synchronous motor drive control system of the cascaded multilevel converter described in this specific embodiment is the permanent magnet synchronous motor drive control system of the cascaded multilevel converter in series, which includes a series Driver 1, permanent magnet synchronous motor 3, signal conditioning circuit 4, DSP controller 5, resolver 6, decoding circuit 7, man-machine interface 8, first current sensor P, second current sensor Q, DC power supply VCC, capacitor C0 , resistor R1 and resistor R2,

[0047] The positive pole of the DC power supply VCC is simultaneously connected with one end of the capacitor C0, one end of the resistor R1, and the positive pole of the DC input power supply of the series driver 1, and the other end of the resistor R1 is simultaneously connected with one end of the resistor R2 and the bus voltage signal of the DSP controller 5 ...

specific Embodiment approach 2

[0053] Specific embodiment two, combine figure 2 Describe this specific embodiment, the permanent magnet synchronous motor drive control system of the cascaded multilevel converter described in this specific embodiment is the permanent magnet synchronous motor drive control system of the parallel cascaded multilevel converter, which includes Parallel drive 2, permanent magnet synchronous motor 3, signal conditioning circuit 4, DSP controller 5, resolver 6, decoding circuit 7, man-machine interface 8, first current sensor P, second current sensor Q, DC power supply VCC, capacitor C0, resistor R0 and resistor R1,

[0054] The positive pole of the DC power supply VCC is simultaneously connected to one end of the capacitor C0, one end of the resistor R1 and the positive terminal of the DC input power of the parallel driver 2, and the other end of the resistor R1 is simultaneously connected to one end of the resistor R2 and the bus voltage signal of the DSP controller 5 The input...

specific Embodiment approach 3

[0060] Embodiment 3. The difference between this embodiment and the permanent magnet synchronous motor drive control system of the cascaded multilevel converter described in Embodiment 1 or 2 is that the DSP controller 5 adopts a chip model of TMS320F2812 32-bit DSP chip implementation.

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Abstract

The invention discloses a permanent magnet synchronous motor drive control system and method of a cascaded multilevel converter and belongs to the technical field of power electronic control. According to the system and the method, the problems that the safety and the comfort level of new energy electric vehicles are affected due to the fact that traction motors on the existing new energy electric vehicles are a lot in output harmonic wave and low in output power quality are solved. According to the system, a traditional framework of a traction motor driver is abandoned, a series-connection cascaded type and parallel-connection cascaded type multilevel converter based topological structure and a control technology are put forward, high-performance drive control of a motor can be realized, in addition, the problem of single direct current power supply is solved, meanwhile, the control method is optimized, and a more reasonable multilevel current waveform output design is put forward according to different requirements of the embedded permanent magnet synchronous motor for current harmonic waves in low speed, medium speed and high speed processes. The system is applicable to occasions requiring high-efficiency and high-performance output and provision of energy sources by the single power supply, such as the new energy vehicles and the like.

Description

technical field [0001] The invention belongs to the technical field of power electronic control, and in particular relates to a drive control system of a permanent magnet synchronous motor of a cascaded multilevel converter. Background technique [0002] At present, the traditional cascaded multilevel converter (CHB, Cascaded H-bridge converter) is widely used in the drive control circuit of permanent magnet synchronous motors. Its advantage is that it can reduce harmonics in the output voltage and obtain lower The du / dt can reduce the generated common mode voltage, reduce the axial pressure of the motor, increase the output power, reduce the switching frequency, and have modular and expandable functions and higher stability. However, the traditional cascaded multi-level converters mostly use several independent DC power supplies, which increases the cost, reduces the efficiency, and brings great difficulties to the design, especially in new energy electric vehicles / hybrids ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02M7/49
CPCH02M7/49
Inventor 吴海波王晓明
Owner HARBIN INST OF TECH
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