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EP0139006A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

System for controlling synchronous motor

Assignee: Fanuc Corp
•
Filing: 1983-12-16
•
Granted: —
•
Expires: 2003-12-16
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A system for controlling a synchronous motor is provided with a detector (112) detecting the rotational angle of a synchronous motor (101), and a control circuit (108) which generates a sine value corresponding to the rotational angle detected by the detector (112) and multiples an effective value current command by that sine value, a multiplication output from the control circuit (108) being applied as a current command value to an armature winding of the synchronous motor (101). In this case, the control circuit (108) is adapted to compensate for the detected rotational angle by the actual velocity of the synchronous motor (101), or by a command velocity given to the synchronous motor.

Inventors

  • 👤 Mitsuo Kurakake
  • 👤 Keiji Sakamoto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 15:12
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/02; H02P25/022; H02P25/024

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 117 words
(1) A synchronous motor control system provided with a sensor for sensing a rotational angle of a synchronous motor, sinusoidal value generating means for generating a sinusoidal value corresponding to the sensed rotational angle from said sensor, computing control means for multiplying an effective value current command by the sinusoidal value generated by said sinusoidal value generating means, and synchronous motor drive means for applying the multiplied output of said computing control means to an armature winding of said synchronous motor as a current command value, characterized in that said computing control means compensates said sensed rotational angle of the synchronous motor by advancing said rotational angle in proportion to the actual velocity of said synchronous motor.
Claim 2
Dependent Claim 28 words
(2) A synchronous motor control system according to claim (1), characterized in that said sinusoidal value generating means and said computing control means are constituted by a microcomputer.
Claim 3
Dependent Claim 105 words
(3) A synchronous motor control system provided with a sensor for sensing a rotational angle of a synchronous motor, sinusoidal value generating means for generating a sinusoidal value corresponding to the sensed rotational angle from said sensor, computing -control means for multiplying an effective value current command by the sinusoidal value generated by said sinusoidal value generating means, and synchronous motor drive means for applying the multiplied output of said computing means to an armature winding of said synchronous motor as a current command value, characterized in that said computing means compensates said sensed rotational angle by a rotational command velocity for said synchronous motor.
Claim 4
Dependent Claim 28 words
(4) A synchronous motor control system according to claim (3), characterized in that said sinusoidal value generating means and said computing control means are constituted by a microcomputer.

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