Control device of motor

A control device and motor technology, applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc., can solve the problem of reduced operating efficiency and achieve the effect of suppressing rapid changes

Inactive Publication Date: 2013-06-19
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the engine control system according to the above-mentioned prior art, when the DC voltage is fixed at the minimum guaranteed voltage of the inverter, there is a possibility that the lead angle control which is not necessary is performed due to the difference in the operating range of the engine. Potential for reduced efficiency
[0006] That is, in the operating region where the induced voltage of the engine does not exceed the power supply voltage, the operation (energization) of the engine can be controlled under the condition that the operating efficiency of the engine is maximized. On the other hand, in the operating region where the induced ...

Method used

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Embodiment Construction

[0040] Next, a motor control device according to an embodiment of the present invention will be described with reference to the drawings.

[0041] The motor control device 10 of this embodiment is mounted on a vehicle, for example, as figure 1 As shown, it is composed of an inverter 13 and a processing device 14, wherein the inverter 13 uses the battery 11 as a DC power supply, and controls three phases (such as U phase, V phase, W phase, etc.) 3-phase) AC brushless DC motor 12 (hereinafter simply referred to as motor 12).

[0042] The inverter 13 includes a bridge circuit (switching circuit) formed by bridge-connecting a plurality of switching elements (for example, bidirectional MOSFET: Metal Oxide Semi-conductor Field Effect Transistor (Metal Oxide Semiconductor Field Effect Transistor), etc.), and a smoothing capacitor. , driven by the signal after pulse width modulation (PWM) of the bridge circuit.

[0043]In addition, the inverter 13 switches on and off the paired swit...

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Abstract

The invention provides a control device of a motor, which can prevent the reduction of operating efficiency. When a DC voltage detection part (31) detects the DC voltage of a storage battery (11), a processing device (14) enables an engine (12) to run in an orthogonal area or a weak magnetic area. When the DC voltage detection part (31) cannot detect the DC voltage of the storage battery (11) in a normal way, the processing device (14) limits the upper limit of a target torque in the orthogonal area and limits the running area of the engine (12) in the orthogonal area. When the running point of the engine (12) enters into the orthogonal area, the processing device (14) sets the DC voltage value used for the engine control to a fixed value which is smaller than a DC voltage value which is normally detected by the DC voltage detection part (31).

Description

technical field [0001] The invention relates to a control device for an electric motor. Background technique [0002] In the prior art, there is known an engine control system (for example, refer to Patent Document 1) that fixes the DC voltage to the inverter when, for example, a voltage detection unit that detects a DC voltage for driving the engine fails to perform normal detection. The minimum guaranteed voltage of the device. [0003] patent documents [0004] Patent Document 1: JP Unexamined Patent Application Publication No. 2005-117756 [0005] However, in the engine control system according to the above-mentioned prior art, when the DC voltage is fixed at the minimum guaranteed voltage of the inverter, there is a possibility that the lead angle control which is not necessary is performed due to the difference in the operating range of the engine. Potential for reduced efficiency. [0006] That is, in the operating region where the induced voltage of the engine do...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/14H02P27/06H02P6/06H02P6/08H02P6/12H02P6/17H02P6/28H02P21/06H02P21/22H02P27/04H02P27/08
Inventor 楠户淳也
Owner HONDA MOTOR CO LTD
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