Title:
CURRENT FEEDBACK AMPLIFIER HAVING TRIM CIRCUIT, AND METHOD FOR CONTROLLING AND MAKING UNIFORM STATOR WINDING CURRENT
Document Type and Number:
Japanese Patent JP3853938
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make uniform the current flowing through the stator winding of a DC polyphase motor by comparing a uniformed sense current with an amplitude regulated reference current, supplying the control current thereof to a driver circuit and controlling the stator winding phase current to a desired level.
SOLUTION: At the time of regulating a stabilized stator current IAC flowing through a coil A 17 and a coil B 19, an LSDB 24 operates as a low potential side driver. A second stage current sense amplifier 100 is connected with a first stage current sense amplifier 30B and the gate-source voltage of the LSDB 24 is regulated. More specitically, the gate-source voltage of a low potential side driver transistor is regulated and controlled using a control circuit comprising the second stage current sense amplifier 100, and the first stage current sense amplifiers 27, 28, 30. According to the arrangement, stator winding current can be made uniform substantially.
Inventors:
Kennis Jay Maggio
Rolf Lagerquist
Rolf Lagerquist
Application Number:
JP29611297A
Publication Date:
December 06, 2006
Filing Date:
September 22, 1997
Export Citation:
Assignee:
Texas Instruments Incorporated
International Classes:
H02P6/08; H02P6/00; H02P7/06; H02P7/10; (IPC1-7): H02P6/08; H02P7/06; H02P7/10
Domestic Patent References:
| JP8149853A | ||||
| JP5091780A |
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Shishido Kaichi
Hideto Takeuchi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo
Fumiaki Otsuka
Shishido Kaichi
Hideto Takeuchi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo
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