Motor control apparatus
AssigneeCanon Kabushiki Kaisha
InventorTetsuya Morita
Life of this patent
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Abstract
With a memory access control portion without being intermediated by control of a CPU controlling an entire drive control of a motor, velocity data for setting velocity of a motor step by step are read out from a velocity table memory, and data value read out from the velocity table are converted by a time conversion circuit to time data, and based hereon a phase switching signal to operate the motor is generated in a phase signal generating portion. In addition, outputting of next data is requested to a memory access control portion in every time data output of a time conversion apparatus and occurrence of access to a next memory table is urged.
Claims13
A motor control apparatus to drive-control a motor to be controlled in combination of a plurality of phase signals, comprising:
- a velocity table memory storing velocity data for setting velocity of said motor step by step;
- a memory access control portion to sequentially read out data of said velocity table without being intermediated by control of a CPU controlling the entire drive control of the motor;
- time conversion means to convert data value read out from said velocity table to time data;
- and
- a phase signal generating portion to generate phase switching signals to operate said motor based on an output of said time conversion means,
- wherein with time data output signals of said time conversion means, occurrence of access to a next memory table toward said memory access control portion is urged.
A motor control apparatus to drive-control a motor to be controlled in combination of a plurality of phase signals, comprising:
- a velocity table memory storing velocity data for setting velocity of said motor step by step;
- a memory access control portion to sequentially read out data of said velocity table without being intermediated by control of a CPU controlling the entire drive control of the motor;
- time conversion means to convert data value read out from said velocity table to time data;
- a phase signal generating portion to generate phase switching signals to operate said motor based on an output of said time conversion means;
- and
- interval control means to urge said memory access control portion to give rise to occurrence of access to a next memory table in a number of predetermined times of time data output of said time conversion means and to control said time conversion means so as to operate with same data values read out from said velocity table up to then.
A motor control apparatus to drive-control a motor to be controlled in combination of a plurality of phase signals, comprising:
- a velocity table memory storing velocity data for setting velocity of said motor step by step;
- a memory access control portion to sequentially read out data of said velocity table without being intermediated by control of a CPU controlling the entire drive control of the motor;
- time conversion means to convert data value read out from said velocity table to time data;
- a phase signal generating portion to generate phase switching signals to operate said motor based on an output of said time conversion means;
- and
- a step register to set any variation amount to a read-out address when said memory access control portion sequentially reads out data of said velocity table.
Dependencies are inferred from the claim text.