Electrical motor position controller

An electrical motor position controller comprising:

• a first bidirectional electric motor having a rotatable output shaft;
• pulse generator means, mounted on the first motor, for generating a series of pulses indicative of the degrees of rotation of the first motor output shaft;
• first motor starter means for supplying electrical power to the first motor;
• and
• a second bidirectional electrical motor having a second rotatable output shaft;
• gear means for coupling the second output shaft of the second motor to the first output shaft of the first motor;
• second motor starter means for supplying electrical power to the second motor;
• control means, having a memory storing a control program and responsive to the pulse generator means and the control program, for energizing the first motor starter means to supply electrical power to the first motor to rotate the output shaft of the first motor in a predetermined programmed direction and for a predetermined programmed number of degrees of rotation and for selectively energizing and de-energizing the second motor, the control means including:
• means for storing at least one profile defining a sequence of operation of the first motor, the one profile being formed of a plurality of discrete, sequentially executed program steps;
• and
• each step formed of programmed instructions specifying a predetermined number of degrees of rotation of the first motor output shaft and an event to take place before the step is executed.

An electrical motor position controller comprising:

• a first bidirectional A.C. electric motor having a rotatable shaft;
• pulse generator means, mounted on the first motor, for generating a series of pulses indicative of the degrees of rotation of the first motor output shaft;
• first motor starter means for supplying electrical power to the first motor;
• means for varying the frequency of the A.C. electric power supplied to the first motor so as to vary the speed of rotation of the first motor output shaft;
• and
• control means, having a memory storing a control program and responsive to the pulse genera means and the central program for energizing the first motor starter means to supply electrical power to the first motor to rotate the output shaft of the first motor in a predetermined programmed direction and for a predetermined programmed number of degrees of rotation, the control means including:
• means for storing a plurality of profiles each defining a sequence of operation of the first motor, each profile being formed of a plurality of discrete, sequentially executed program steps;
• and
• each step formed of programmed instructions specifying a predetermined number of degrees of rotation of the first motor output shaft, an event to take place before each step is executed, and a speed of rotation of the first motor output shaft.

An electrical motor position controller comprising:

• a first bidirectional electrical motor having a rotor, a rotor brake disc and a starter, the rotor rotatably driving a motor output shaft;
• pulse generator means, mounted on the first motor, for generating a series of pulses indicative of the degrees of rotation of the first motor output shaft;
• first motor starter means for supplying electrical power to the first motor;
• and
• control means, having memory storing a control program and responsive to the pulse generator means and the control program, for energizing the first motor starter means to supply electrical power to the first motor to rotate the output shaft of the first motor in a predetermined programmed direction and for a predetermined programmed number of degrees of rotation according to a program sequence;
• the pulse generator means generating first and second, phase offset pulse trains upon rotation of the rotor;
• a notch formed on a peripheral edge of the rotor brake disc;
• means, mounted in the first motor, for sensing the passage of the notch therepast as the rotor rotates, the sensing means generating an output signal for each passage of the notch therepast;
• and
• pulse signal conditioner means, receiving the first and second pulse trains from the pulse generator means and the output signal from the sensing means, for generating a first set of signals corresponding to normal first and second pulse trains and the output from the sensing means and a second set of signals corresponding to inverted first and second pulse trains and an inverted output from the sensing means.