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Inverter Control

A technology of control devices and inverters, applied in control systems, vector control systems, AC motor control, etc., can solve the problem of total magnetic flux reduction and achieve the effect of optimizing efficiency

Active Publication Date: 2016-12-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Among them, Patent Document 2 describes that in order to increase the effect of field weakening control in the high-speed rotation region, the magnetic flux command is reduced as the rotational speed of the motor increases, and the total magnetic flux that is kept constant is also reduced accordingly.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0089] figure 1It is a diagram showing the system configuration of the inverter control device according to Embodiment 1 of the present invention. The inverter control device according to Embodiment 1 is provided with a rectifying means which is composed of a diode bridge and which supplies electric power from an AC power supply 1 such as a commercial frequency power supply as a single-phase AC power supply and full-wave rectifies the supplied AC power supply 1 . The rectifying section 2; the smoothing section 3 as a smoothing unit, which sets the value of the capacitor 32 so that the output voltage from the rectifying section 2 greatly pulsates at a frequency approximately twice the power supply frequency of the AC power supply 1; the smoothing section from the smoothing section The smooth voltage of 3 is converted into the AC voltage of the desired frequency and voltage value, the DC-AC conversion unit 4 as the DC-AC conversion unit; and the information for driving the moto...

Embodiment approach 2

[0172] figure 2 It is a diagram showing the system configuration of the inverter control device according to Embodiment 2 of the present invention. In the second embodiment, for the inverter control device of the above-mentioned embodiment 1 ( figure 1 ) Components with the same function and structure are marked with the same symbols, and in the case of the same operation, they are omitted due to duplication of description, and different contents are explained.

[0173] The inverter control device according to Embodiment 2 differs from the inverter control device according to Embodiment 1 in that, as a constituent element, a DC-side inverter based on the DC-AC conversion unit 4 detected by the current detection unit 7 is newly provided. The regenerative period measurement unit 18 measures the period during which the regenerative current flows from the motor 5 to the capacitor 32 for each fluctuation cycle of the smoothed voltage. In the current phase difference adjustment ...

Embodiment approach 3

[0187] image 3 It is a diagram showing the system configuration of the inverter control device according to Embodiment 3 of the present invention. In the third embodiment, for the inverter control device of the above-mentioned embodiment 1 ( figure 1 ) and the inverter control device of Embodiment 2 ( figure 2 ) Components with the same function and structure are marked with the same symbols, and in the case of the same operation, they are omitted due to duplication of description, and different contents are explained.

[0188] In the inverter control device of Embodiment 3 ( image 3 ), and the inverter control device of Embodiment 2 ( figure 2 ) are different in that, as constituent elements, an AC voltage detection unit 9 as an AC voltage detection unit for detecting the voltage of the AC power supply 1 and a unit for calculating the absolute value of the AC voltage detection value Vac detected by the AC voltage detection unit 9 are newly provided. Absolute value co...

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PUM

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Abstract

The drive control unit (6) in the inverter control device composed of a small-capacity capacitor (32) includes: based on the armature current of the motor (5) with a high ratio of reluctance torque, the motor (5) is estimated The magnetic flux estimation part (17) of interlinkage magnetic flux; and the current phase difference adjustment part (14) for adjusting the phase difference of the current relative to the induced voltage generated by the motor (5), are configured to be performed by the current phase difference adjustment part The phase is adjusted so that the estimated value of the interlinkage magnetic flux estimated by the magnetic flux estimation unit (17) is below the specified set value, and the average value of the current command value and the effective value of the armature current given to the motor (5) At least one of the average value and the average value of the peak value of the armature current is the minimum value.

Description

technical field [0001] The present invention relates to an inverter control device in which a smoothing unit composed of a small-capacity capacitor is clearly connected to the output terminal of a rectifier unit, and the output voltage pulsates greatly at twice the frequency of the AC power supply, and particularly relates to an inverter control device driven at an arbitrary rotational speed. Inverter control devices for electric motors such as brushless DC motors. Background technique [0002] A general inverter control device for driving a motor rectifies the AC power, uses a smoothing capacitor to smooth the rectified DC power, and uses an inverter to convert the smoothed DC power into AC power at an arbitrary speed and voltage. This AC power is supplied to the motor. [0003] In the case of the above configuration, since the smoothing capacitor is required, this smoothing capacitor becomes a factor of increasing the size and cost of the conventional inverter control dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/06H02P6/06
CPCH02P6/06H02P21/141H02P23/14H02P27/08H02P21/18H02P21/26H02P27/06
Inventor 河地光夫
Owner PANASONIC CORP