Title:
SYNCHRONOUS MOTOR CONTROLLER
Document Type and Number:
Japanese Patent JP3396440
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To output a torque with desired number of revolutions by compensating for the number of starting revolutions of weak field control depending on a detected value of a battery voltage at the time of weak field control, so that the number of initial revolutions becomes high when a battery voltage is large and the number of initial revolutions becomes low when a battery voltage is small.
SOLUTION: A capacitor 3 and a battery voltage detector 5 are connected to an inverter circuit 2, and a battery voltage Vb is transferred to a current command deciding part 9. A weak field controller 90 calculates and outputs dq axis current command Id*, Iq* based on the number of revolutions N outputted from a speed command detector 6, a battery voltage Vb detected with a battery voltage detector 5 and a torque command τ* processed with a torque command processor 8. A weak field controller 90 of the current command deciding part 9 is provided with a dq axis current command table search means and a weak field initial number of revolutions compensating mans. As a result, sufficient weak field control can be realized under the condition that a terminal voltage of motor dose not exceed the battery voltage.
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Inventors:
Yamato Matsui
Hiroshi Katada
Takefumi Sawada
Hiroshi Katada
Takefumi Sawada
Application Number:
JP2988699A
Publication Date:
April 14, 2003
Filing Date:
February 08, 1999
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
B60L11/18; B60L15/02; H02P6/06; H02P6/08; H02P6/12; H02P6/28; H02P21/00; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P23/14; H02P23/16; H02P23/18; H02P23/28; H02P27/04; H02P27/06; H02P27/08; (IPC1-7): H02P6/12; H02P5/41; H02P21/00
Domestic Patent References:
| JP10210799A | ||||
| JP923698A | ||||
| JP10136699A |
Attorney, Agent or Firm:
Yukihiko Takada (1 outside)