Acceleration control apparatus

• US 4,808,895 A
• Filed: 11/30/1987
• Issued: 02/28/1989
• Est. Priority Date: 11/30/1987
• Status: Expired due to Fees

• Current Assignee: Toshiba Machine Company Limited (Shibaura Machine Co., Ltd.)
• Original Assignee: Toshiba Machine Company Limited (Shibaura Machine Co., Ltd.)
• Inventors: Oda, Etsuzi, Fujita, Jun, Nakanishi, Yoshinori, Yamashita, Kazutaka
• Primary Examiner(s): Ro, Bentsu
• Application Number:
  US07/126,926
• Time in Patent Office: 456 Days
• Field of Search: 318/255, 318/268, 318/276, 318/301, 318/311, 318/342, 318/384, 318/385, 318/397, 318/404, 318/271
• US Class Current: 318/400.09
• CPC Class Codes: H02P 23/20 Controlling the acceleration or deceleration

Abstract

This invention provides an acceleration control apparatus suitable for use as various kinds of feed control. A comparator circuit compares a command value supplied from an acceleration commanding unit and an actual value of acceleration detected by a signal generator connected to a motor to be controlled. A voltage command computing circuit provided at a rear stage of the comparator circuit effect predetermined processing of an acceleration deviation signal on the basis of the result of this comparison to output the resultant command voltage to a driving control circuit. This command voltage is output to the motor and thus acceleration of the motor is controlled.

Claims

1. An acceleration control apparatus comprising:

an acceleration commanding unit;

a signal generator connected to a motor for generating a signal indicative of an actual value of acceleration of said motor;

a comparator circuit for generating an acceleration deviation signal by comparing an acceleration command value supplied from said acceleration commanding unit and said actual value of acceleration supplied from said signal generator;

a voltage command computing circuit for calculating a voltage command value on the basis of an acceleration deviation signal output from said comparator circuit; and

a driving control circuit for generating electrical signals suitable for driving and controlling said motor on the basis of said voltage command value of said voltage command computing circuit,

whereby acceleration is controlled on the basis of the comparison of said acceleration command value and said actual value of acceleration.

2. An acceleration control apparatus according to claim 1, wherein said signal generator includes a position detector and a differentiating circuit both of which are directly connected to said motor.

3. An acceleration control apparatus according to claim 2, wherein said position detector is constituted by a pulse encoder.

4. An acceleration control apparatus according to claim 2, wherein said signal generator is arranged to output a speed feedback signal and a position feedback signal to said voltage command computing circuit.

5. An acceleration control apparatus according to claim 1, wherein said signal generator is constituted by an acceleration detector connected directly to said motor.

6. An acceleration control apparatus according to claim 1, wherein said driving control circuit is constructed including PWM pattern conversion means.

7. An acceleration control apparatus according to claim 1, wherein said motor is a three-phase, permanent-magnetic-field type of motor.

8. An acceleration control apparatus according to claim 1, wherein said motor is a d.c. motor.