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Linear Current Motor Drive with Silicon Controlled Rectifier

IP.com Disclosure Number: IPCOM000115421D
Original Publication Date: 1995-May-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Hisano, T: AUTHOR [+2]

Abstract

Disclosed is a Linear Current Motor Drive with Silicon Controlled Rectifier (SCR) in which a proportional motor current is supplied to the motor. The motor current is proportional to a control signal for controlling the motor.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Linear Current Motor Drive with Silicon Controlled Rectifier

      Disclosed is a Linear Current Motor Drive with Silicon
Controlled Rectifier (SCR) in which a proportional motor current is
supplied to the motor.  The motor current is proportional to a
control signal for controlling the motor.

      Figs. 1 and 2 show the example of this drive.  The Transformer
(1) generates a current in response to AC, and supplies it to the
Motor (2).  The Integtator (5) generates the carrier signal, which is
a integrated signal of sin(x).  The carrier signal described as 1
over k (1-cos(x)) and a control DC signal are input to the Comparator
(4).  The Comparator (4) generates a pulse width moderated signal PWM
in response to the level of the control DC signal, and supplies it to
the gate of the SCR (3) as a switch.  When the level of PWM is high,
the motor current is flow and the motor (2) is activated.

      Fig. 3 shows the relationship between the control signal and
the motor current.  The motor current increases in proportion to the
voltage of the control signal.

      The motor current is proportional even though servo controller
requires proportional relationship in order to control the velocity
and position of DC motor.