Fan motor control device and air conditioner
A control device, motor technology, applied in starting devices, single motor speed/torque control, heating and ventilation control systems, etc., to achieve the effect of preventing overcurrent, stabilizing current, and simplifying processing
Inactive Publication Date: 2010-03-17
DAIKIN IND LTD
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Problems solved by technology
[0003] In the above fan motor control device, there is a problem that in synchronous operation, since the position signal is not referred to as in the position detection operation, when the inverter output voltage is relative to the actual rotor of the fan motor, there is a problem that When the phase of the fan motor is deviated, an overcurrent will flow through the stator coil of the fan motor
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[0032] The control device for the fan motor and the air conditioner of the present invention will be described in more detail below through the illustrated embodiments.
[0033] figure 1 It is a configuration diagram of a fan motor control device used in an air conditioner according to an embodiment of the present invention, 1 is an inverter unit that converts an AC voltage from an AC power supply 11 into a DC voltage, and 2 is an inverter unit that converts the AC voltage from the AC power supply 11 to a DC voltage. 3 is an inverter unit that converts the DC voltage of the inverter unit 1 into a three-phase AC voltage and outputs it, 3 is a control unit that controls the inverter unit 2, and 4 is a three-phase AC voltage applied from the inverter unit 2. Fan motors with phase AC voltage.
[0034] The inverter unit 1 has: a diode bridge 12 that performs full-wave rectification of the AC voltage input from the AC power supply 11, and outputs a rectified DC voltage; and a smoot...
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A fan motor control device includes: an inverter unit (2) for driving a fan motor (4); two position sensors (43, 44) for detecting a rotation position of a rotor (42) of the fan motor (4); and a control unit (3) for controlling output of the inverter unit (2). The control unit (3) has a start control unit (33a). Upon start of the fan motor (4), when the current rpm obtained from position signals Hu, Hv detected by the position sensors (43, 44) substantially coincide with the rpm of output of the inverter unit (2), the start control unit (33a) terminates a synchronization operation for outputting a start exciting pattern from the inverter unit (2) and performs a position detection operation based on the position signals Hu, Hv detected by the position sensors (43, 44). The control unit (3)also has a phase correction unit (33b) which corrects a phase of an output voltage of the inverter unit (2) according to the rise and the fall of the position signals Hu, Hv detected by the position sensors (43, 44) during the synchronization operation.
Description
technical field [0001] The present invention relates to a control device for a fan motor, and more particularly to a control device for a fan suitable for driving a fan motor for an air conditioner, and an air conditioner using the same. Background technique [0002] Conventionally, there is a fan motor control device that considers synchronous operation until the current rotation speed of the inverter matches the output rotation speed of the inverter when the single Hall sensor DC (direct current) fan motor is started, and then Control is performed to shift to position detection operation based on the position signal (for example, refer to JP-A-2006-174647). [0003] In the above fan motor control device, there is a problem that in synchronous operation, since the position signal is not referred to as in the position detection operation, when the inverter output voltage is relative to the actual rotor of the fan motor, there is a problem that If the phase of the motor is d...
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IPC IPC(8): H02P6/20F24F11/04F24F11/02H02P6/06F24F11/48F24F11/49F24F11/62F24F11/74F24F11/871F24F140/00H02P6/08H02P6/17
CPCH02P6/20
Inventor 菅俊介板垣哲哉
Owner DAIKIN IND LTD