Title:
SPEED DETECTING SYSTEM FOR SERVO MOTOR
Document Type and Number:
Japanese Patent JPS59117479
Kind Code:
A
Abstract:
PURPOSE:To reduce the load of a microprocessor by calculating a current loop for the prescribed period and a speed loop for the prescribed period, and calculating the actual speed for each period from the actual current value read out for the prescribed period and the armature voltage command value outputted from the prescribed period. CONSTITUTION:When position detecting pulses P1, P2 do not arrive during the period of a sampling pulse, it is judged as a low speed, and a processor 108a calculates the actual speed (v) on the basis of the armature voltage command (u) obtained by the armature current (i) and the current loop calculation. At this time, the current loop calculation is performed for each period T1, and the armature current is read out at the period T2 of the integer magnification of the period T1. Accordingly, the actual speed is calculated for each period T2 from the armature current for each period T2 and the armature voltage command value for each period T1. At a high speed rotation time, the actual speed (v) is calculated on the basis of the interval T0 of the position detecting pulses.
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| JPS60173606 | MEASURING PROCESSOR |
Inventors:
KURAKAKE MITSUO
SAKAMOTO KEIJI
SAKAMOTO KEIJI
Application Number:
JP22417782A
Publication Date:
July 06, 1984
Filing Date:
December 21, 1982
Export Citation:
Assignee:
FANUC LTD
International Classes:
G05D13/62; G01P3/44; G05B21/02; H02P21/04; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P23/03; H02P23/14; H02P23/16; H02P27/06; H02P27/08; H02P29/00; (IPC1-7): G01P3/44; G05B21/02; G05D13/62; H02P5/00
Domestic Patent References:
| JPS5755781A | 1982-04-02 |
Attorney, Agent or Firm:
Minoru Tsuji