Control device for electric compressor used in vehicular air conditioner
An electric compressor and control device technology, applied in the direction of electronic commutation motor control, single motor speed/torque control, pump control, etc., can solve problems such as increase in startup failure and decrease in value
Inactive Publication Date: 2009-07-29
MITSUBISHI HEAVY IND LTD
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Problems solved by technology
Therefore, the noise from the electric compressor may reduce the value as a commodity
In addition, when the rotor position is not grasped and the control is performed, the possibility of starting failure increases
Method used
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[0033] The electric compressor control device of the present invention is suitable for the production and use of the permanent magnet type synchronous motor control device installed in or connected to the electric compressor used in the vehicle air conditioner.
[0034] figure 1 It is an explanatory diagram showing the configuration of an embodiment of the present invention. In an electric compressor used in an on-vehicle air conditioner, a permanent magnet synchronous motor 3 (hereinafter referred to as a motor 3 ) provided inside or connected to it usually has a conversion control using a fixed DC battery (battery) as a power source 4 . The embodiment of the present invention is also similar to this, and a case where frequency conversion control is performed will be described.
[0035] The control of the motor 3 during steady state operation is controlled by the drive control unit 8 of the main controller 1 of the air conditioner, using the rotational speed or torque of the...
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A control device for an electric compressor having a short pulse control unit, a current detection unit, and a rotor position estimation unit. When the permanent magnet synchronous motor is started, the short pulse control unit supplies a stable current to each phase of the stator of the motor for a very small time when the rotor does not rotate. The current detection unit acquires the current value when the current from the short pulse control unit flows into each phase of the motor. The rotor position estimation unit estimates the rotor position by comparing the magnitudes of the current values of each phase obtained by the current detection unit. The condition determination unit has an operation of stopping or restarting the application of voltage to the electric motor, and has an operation of stopping or restarting the application of voltage to the electric motor based on a high-pressure part pressure value of the compressor. The sheet-shaped antimagnetic device is formed by sandwiching electrically conductive and thermally conductive materials with insulating materials, covering necessary parts of the substrate constituting the control device, and the exposed portions of the electrically conductive and thermally conductive materials are in contact with the housing or the The parts that can conduct heat to the housing are connected.
Description
technical field [0001] The present invention relates to a control device for an electric compressor capable of smoothly starting a permanent magnet type synchronous motor incorporated in an electric compressor used in an on-vehicle air conditioner. Background technique [0002] In an electric vehicle air conditioner installed in a hybrid vehicle, FCEV (fuel cell vehicle), HEV (hydrogen vehicle), etc., the control of the electric compressor is usually so-called sensorless control. In the sensorless control of the permanent magnet type synchronous motor, since the position of the rotor is not clear at the time of starting the motor, synchronous operation cannot be performed immediately. Therefore, in the conventional control, a three-phase voltage (current) for rotating the rotor at a constant speed is output to the motor for a certain period of time to forcibly start the motor (eg, JP-A-2003-28073). The electric compressor requires a separate control device for performing th...
Claims
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IPC IPC(8): F04B49/06H02P6/20F04B49/02H02P6/06H02P6/08H02P6/18H02P6/182
Inventor 服部诚浅井雅彦鹰繁贵之中野浩児中神孝志
Owner MITSUBISHI HEAVY IND LTD