Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1993-04-29
1996-02-27
Ip, Paul
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318293, H02P 700
Patent
active
054951542
ABSTRACT:
A kelvin current sensing circuit in an integrated control circuit that controls the current flowing through the driving coils of a polyphase DC motor. The invention provides for adjusting the voltage to the lower driver transistors of the control circuit by having the kelvin current sensing occur internally within the chip. A ground compatible differential amplifier circuit is used in one embodiment. Each of the lower transistors are connected to the base of respective PNP transistors, the emitters of which being connected together to control one side of the differential amplifier. A control voltage is applied to the other side of the differential amplifier. The output of a comparator, that is connected to the differential amplifier, is used to control the operation of the lower driver transistors. Therefore all of the sensing is done internally in the semiconductor chip. The voltages are taken at the source of each of the lower transistors. This eliminates the parasitic resistances associated with the connection between the transistors and the sense resistor attached externally to the device. Since the kelvin current sensing is done internally, the pin which connected the inverting input of the comparator to the sensing resistor has been eliminated.
REFERENCES:
patent: 4472666 (1984-09-01), Akeda et al.
patent: 4491770 (1985-01-01), Gotou
patent: 4494053 (1985-01-01), Gotou
patent: 4500830 (1985-02-01), Gotou et al.
patent: 4595865 (1986-06-01), Jahns
patent: 4712050 (1987-12-01), Nagasawa et al.
patent: 4777579 (1988-10-01), Jahns
patent: 4780651 (1988-10-01), Nakano et al.
patent: 4945445 (1990-07-01), Schmerda et al.
patent: 5032774 (1991-07-01), Juzswik
patent: 5122715 (1992-06-01), Kimura et al.
patent: 5166583 (1992-11-01), Min et al.
patent: 5173645 (1992-12-01), Naito
patent: 5196771 (1993-03-01), Naito
patent: 5210475 (1993-05-01), Juzswik et al.
patent: 5319291 (1994-06-01), Ramirez
Low, et al., "Comparison of two control strategies in development of high-torque electronically commutated drive", IEEE Proceedings-B, vol. 139 No. 1, (Jan., 1992) pp. 26-36.
Anderson Rodney M.
Bachand Richard A.
Ip Paul
Jorgenson Lisa K.
SGS-Thomson Microelectronics Inc.
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