Abstract:
PURPOSE: A hall sensor position compensation method of a BLDC electric motor and a BLDC electric motor supporting thereof are provided to implement the accuracy of the control, thereby reducing the malfunction. CONSTITUTION: A motor comprises a stator and a rotor. A plurality of hall sensor detects the rotator position of the motor. A motor control unit (130) applies the position correction value to the motor driving control. An inverter (150) provides the power source which is necessary for the motor driving. A pulse width modulation (PWM) driving unit (140) generates a PWM driving signal. [Reference numerals] (130) Motor control unit; (140) PWM driving unit
Abstract:
PURPOSE: An inverter device having a power source circuit is provided to use an existing bootstrap power source for driving a gate, thereby reducing production costs. CONSTITUTION: An inverter device having a power supply circuit includes a converter circuit part(110), a smoothing circuit part(120), an inverter circuit part, and a current detecting circuit part(140). The converter circuit part rectifies an alternating current power source into a direct current power source. The smoothing circuit part smooths a rectified direct current. The current detecting circuit part detects an excess current from the direct current. The inverter circuit part includes a switching circuit and an auxiliary circuit. The switching circuit uses a bootstrap power source as a power source. The auxiliary circuit applies the bootstrap power source to the current detecting circuit part. [Reference numerals] (140) Current detecting circuit part; (141) Insulation; (150) Control circuit part; (AA) Power; (BB) DCP detecting resistance; (CC) Motor
Abstract:
PURPOSE: A motor circuit and a method for supplying power to the circuit for detecting overcurrent of an inverter are provided to reduce the size of the whole system by reducing the size of a transformer. CONSTITUTION: A rectifier(DB1) rectifies AC input power. A switching power supply device(140) generates voltage for boosting voltage of a pulse-width modulating signal to a certain level. An overcurrent detecting circuit(100) performs the overcurrent detection of a DCP terminal of an inverter. A snubber circuit(130) charges the flyback power source of the switching power supply device. The power supply circuit(120) supplies the flyback power source as the drive power of the overcurrent detecting circuit. [Reference numerals] (100) Overcurrent detecting circuit; (120,AA) Power supply circuit; (130) Snubber circuit; (140) Switching power supply device
Abstract:
PURPOSE: A MOSFET gate driving circuit and a driving method thereof are provided to reduce manufacturing costs by removing a pulse transformer for driving a MOSFET in a MOSFET series drive circuit. CONSTITUTION: A first switching device(S1) and a second switching device(S2) are serially connected to a primary winding of a transformer. A control unit(U1) controls the second switching device. A serial input power source(DC1) supplies a serial input voltage to the first switching device and the second switching device. A first diode(D1) is located between a gate terminal of the first switching device and a secondary winding(T2) of the transformer. A second diode(D2) is located between the gate terminal of the first switching device and a serial input power source. [Reference numerals] (AA) Flyback voltage; (U1) Control IC
Abstract:
PURPOSE: A PWM(Pulse with Modulation) Signal operation circuit which uses insulation signal feedback, and a signal control method thereof are provided to improve product reliability by confirming the transmission of a PWM signal, and to lower the prices of circuit components, thereby supporting the production and sales of competitive products. CONSTITUTION: A PWM signal operation circuit includes a PWM signal transfer circuit(101) which generates and supplies PWM signals which are transmitted as insulated signals by using a high speed photo-coupler(130); and an insulation signal feedback circuit(102) for the steady-state comparison of the signal transmission where the feedback signal of a low speed photo-coupler(170) for the feedback of the signal, which is output by the high speed photo-coupler, is compared with a transmitted signal before the transmission of the high speed photo-coupler. [Reference numerals] (120) Buffer; (130) High speed photo-coupler; (140) Gate driver; (150) Power semiconductor; (160) Filter; (170) Low speed photo-coupler; (180) Comparison circuit; (AA) Insulation; (BB) Malfunction signal
Abstract:
PURPOSE: A method and an apparatus for estimating the initial rotor of a permanent magnet synchronous motor are provided to facilitate algorithm embodiment. CONSTITUTION: A vector control mode supports a SVPWM(Space Vector Power Width Modulation)(30). Current information is collected from four vectors among six vectors. The collected current information is compared. The position of a rotor is presumed based on comparison result. [Reference numerals] (40) Initial rotor position estimating apparatus