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Control devices for three-phase rotating electrical machines

A technology for rotating electrical machines and control devices, applied in AC motor control, torque ripple control, control systems, etc., can solve problems such as reduced control stability and reduced tolerance to rotation fluctuations

Inactive Publication Date: 2020-08-28
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the frequency of position detection becomes low, the tolerance to rotation fluctuations may decrease, resulting in a decrease in control stability.

Method used

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  • Control devices for three-phase rotating electrical machines
  • Control devices for three-phase rotating electrical machines
  • Control devices for three-phase rotating electrical machines

Examples

Experimental program
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Effect test

Embodiment Construction

[0039] Hereinafter, a first embodiment of a control device for a three-phase rotating electrical machine according to the present invention will be described with reference to the drawings.

[0040] exist figure 1 The system configuration of this embodiment is shown in . figure 1 The illustrated electric motor 10 is a surface permanent magnet synchronous motor (SPMSM). In addition, the motor 10 is obtained by Y-connecting three stator coils. The electric motor 10 is incorporated in an oil pump 12 that discharges oil to a CVT (Continuously Variable Transmission) 14 provided in a drive system of a vehicle. A battery (DC voltage source) 16 is connected to the motor 10 via an inverter INV. The inverter INV is a circuit that switches between the voltage source terminal on the high voltage side and each voltage source terminal on the low voltage side of the battery 16 and each of the three winding terminals of the motor 10 . In addition, a winding terminal is a terminal which de...

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PUM

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Abstract

The invention provides a control device for a three-phase rotary motor, which can appropriately suppress decrease in tolerance to rotation variation and ensure the overlapping amount. The control device is powered on at 120 degrees in a first mode, and executes sensorless control during zero-cross timing of monitored induced voltage (e $) in monitoring of the induced voltage (e $ ($ = u, v, w)); the control device is powered on at 130-140 degrees in a second mode and executes sensorless control during zero-cross timing of monitored induced voltage (e $) in monitoring of the induced voltage (e $ ($ = u, v, w)); and in the condition that the absolute value of the rotation angular acceleration is less than a threshold, the control device switches from the second mode to the first mode.

Description

[0001] The entire content of Japanese Patent Application No. 2015-020054 (filing date: February 4, 2015), including the specification, drawings, and abstract of the specification, is hereby incorporated by reference. technical field [0002] The present invention relates to a control device for a three-phase rotating electrical machine that controls a control amount of the three-phase rotating electrical machine by operating an inverter. Background technique [0003] For example, JP-A-2010-252406 proposes a sensorless processing device capable of detecting an induced voltage from a terminal voltage in a region where the rotation speed of a three-phase rotating electric machine is low. The amount of overlap is energized in a rectangular wave, and the amount of overlap is increased in a region where the rotation speed is high. Here, when the overlap amount is increased, the induced voltage cannot be detected from the terminal voltage. Therefore, in this device, in a region wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/10H02P27/08
CPCH02P6/10H02P27/085
Inventor 香川弘毅
Owner JTEKT CORP