Power converting device with inverter circuitry for driving mult

Details Power converting device with inverter circuitry for driving mult Power converting device with inverter circuitry for driving mult

1992-06-30

1994-12-13

Voeltz, Emanuel T.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363132, 318811, H02M 75387

Patent

active

053734360

ABSTRACT:
A power conversion device of the inverter type for three-phase DC motor includes three parallel pairs of output transistors between a power supply voltage and the ground potential. These pairs provide three upper-stage transistors and three lower-stage transistors with diodes being coupled thereto. Drivers are connected to the transistors respectively. A capacitor for each upper-stage driver has an electrode coupled to the power supply voltage and the other electrode coupled to the ground through a corresponding lower-stage transistor. A controller controls the upper- and lower-stage drivers in response to a pulse width modulation (PWM) signal generated by a PWM generator to represent a desired motor rotation speed. The upper-stage transistors are PWM-driven so that each one turns on and off repeatedly during a 120-degree electrical angle period. While one upper-stage transistor is PWM-driven during a 120-degree period, a corresponding lower-stage transistor turns on in response to a reverse-phased pulse at the beginning of this period, thereby charging the capacitor.

REFERENCES:
patent: 5216587 (1993-06-01), Miyazaki et al.
patent: 5253156 (1993-10-01), Sakurai et al.
EDN Electrical Design News, vol. 32, No. 18, Sep. 3, 1987, pp. 227-234, Daniel Artusi, et al., "Solid-State Devices Ease Task of Designing Brushless DC Motors".
IEEE Transactions on Power Electronics, vol. 6, No. 1, Jan. 1991, pp. 118-126, Thomas M. Jahns, et al., "Integrated Current Regulation for a Brushless ECM Drive".
Electronique Radio Plans, No. 523, Jun. 1991, pp. 89-93, R. Lahaye, "La Serie SP-600, Circuits HT De Commande en Demi-Pont".
Nikkei Electronics (No. 456); Dean F. Henderson, et al. Sep. 19, 1988. pp. 213-224.
T. IEE Japan, vol. 111-D, No. 2, 1991, pp. 117-124; H. Miyazaki, et al. "250 V 1 A Three-Phase Monolithic Inverter IC for Brushless Motor Drives".

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