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A Loss Minimal Direct Torque Control Method for Hybrid Excitation Synchronous Motor

A hybrid excitation synchronous and direct torque control technology, applied in the field of electrical transmission, can solve the problems of insufficient constant power operating range and insufficient efficiency.

Active Publication Date: 2019-02-01
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a direct torque control method with the minimum loss of a hybrid excitation synchronous motor, which solves the problems in the prior art that the efficiency of the direct torque control system of the hybrid excitation synchronous motor is not high enough and the constant power operating range is not wide enough

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  • A Loss Minimal Direct Torque Control Method for Hybrid Excitation Synchronous Motor
  • A Loss Minimal Direct Torque Control Method for Hybrid Excitation Synchronous Motor
  • A Loss Minimal Direct Torque Control Method for Hybrid Excitation Synchronous Motor

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Embodiment Construction

[0067] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0068] figure 1 It is a logic flow diagram of the method of the present invention, and the drive signal is obtained through signal acquisition and formula calculation to drive the power converter.

[0069] figure 2 In order to realize the control system block diagram of the present invention, the control system consists of a reference current calculation module, a voltage space vector pulse width modulation (SVPWM) module, an inverter, a hybrid excitation synchronous motor, a power converter, and a pulse width that eliminates specified order harmonics Modulation (SHEPWM) module and stator flux and flux position angle calculation module.

[0070] image 3 In order to realize the system structure block diagram of the method of the present invention, the system is composed of an AC power supply, a rectifier, a voltage stabilizing capacitor, ...

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Abstract

The invention discloses a minium loss and direct torque control method for a hybrid excitation synchronous motor; the method comprises the steps of acquiring current and voltage signals from a motor main circuit, processing the signals in a controller, calculating stator flux linkage amplitude, azimuth, electromagnetic torque, and increment of angle of attack subsequently, judging motor operation intervals according to speed, calculating stator Alpha axis voltage and Beta axis voltage according to stator flux linkage reference values under the different operation intervals, and driving a main power converter, namely an excitation power converter. The minium loss and direct torque control method for the hybrid excitation synchronous motor provides reduced motor copper loss, iron loss, stray loss, and mechanical loss, motor loading capacity and torque quick response capacity are improved, the speed adjusting range of the motor is widened, energy utilization efficiency is improved, and electricity is saved.

Description

technical field [0001] The invention belongs to the technical field of electric transmission, and in particular relates to a direct torque control method with minimum loss of a hybrid excitation synchronous motor. Background technique [0002] Hybrid excitation synchronous motor is a kind of wide speed regulation motor developed on the basis of permanent magnet synchronous motor and electric excitation synchronous motor. The main purpose is to solve the problem that the air gap magnetic field of permanent magnet synchronous motor is difficult to adjust. The hybrid excitation synchronous motor has two excitation sources, one is permanent magnet and the other is electric excitation. The magnetic potential generated by the permanent magnet is the main magnetic potential, and the magnetic potential generated by the electric excitation winding is the auxiliary magnetic potential. The hybrid excitation synchronous motor combines the advantages of the permanent magnet synchronous m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/30
CPCH02P2205/05
Inventor 赵纪龙景梦蝶孙向东
Owner XIAN UNIV OF TECH
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