About 56 results
https://drivepatents.com/patents/1006453 · 4 Jan 2012
An inverter for an electric vehicle includes a speed instruction generating unit, a frequency voltage converting unit, an integrator and a 2-to-3 phase converter. The speed instruction generating unit outputs a speed instruction for changing the rotational...
https://drivepatents.com/patents/1008906 · 5 Oct 2011
The method involves supplying electric current of an alternating current (AC) generator (4) to a direct current (DC) intermediate circuit by an inverter (16) i.e. pulse inverter, and measuring current of a stator of the generator by a stator current sensor...
https://drivepatents.com/patents/1009730 · 31 Aug 2011
Provided is a drive device for an alternating current motor which performs vector control on sensorless driving of the alternating current motor in an extremely low speed region without applying a harmonic voltage intentionally while maintaining an ideal P...
https://drivepatents.com/patents/1009912 · 24 Aug 2011
A second control unit 100 includes a current-command generating unit 10 that generates, based on a torque command T*, a current command of the motor 6, a voltage-amplitude-index calculating unit 150 that calculates, based on the current command, a voltage ...
https://drivepatents.com/patents/1012913 · 18 May 2011
Based on rotation information of a synchronous machine (5) detected by rotation information detection means (6), control means (7) cause a converter (2) to boost a charge voltage Vc of a capacitor (3) so as to be higher than an induced voltage Vm generated...
https://drivepatents.com/patents/1015474 · 23 Feb 2011
A power conversion device 200 comprises a power conversion unit of a three phase full bridge type including upper arm switching devices 328 and lower arm switching devices 330, and a controller 170 that outputs drive signals to these switching devices 328,...
https://drivepatents.com/patents/1087804 · 21 Apr 2004
The invention relates to a motor driven vehicle and a method for controlling it. This invention aims to provide a motor driven vehicle capable of effecting a constant running performance when the power source voltage is a predetermined value or greater. It...
https://drivepatents.com/patents/1092750 · 8 Oct 2003
In control apparatus and method for at least one electrical rotating machine, two rotors are disposed in the electrical rotating machine on the same axis of rotation and being driven independently of each other by means of a generated compound current and ...
https://drivepatents.com/patents/1098105 · 26 Feb 2003
A method and system (10) for estimating a parameter of an electric machine (12), including a controller (18) and a switching device, the controller (18) executes a parameter estimation process, which is responsive to at least one of: a current value and a ...
https://drivepatents.com/patents/1102100 · 4 Sep 2002
A motor control system 16 for use within an electric vehicle 10 having an induction motor 12. Control system 16 utilises a torque control module 18, a vector control module 20 and a space vector PWM module 22 to efficiently and accurately control the torqu...