Solid state series motor control

1. A solid state series motor control comprising:

first and second FORWARD DRIVE elements;

first and second REVERSE DRIVE elements;

wherein said FORWARD DRIVE elements and REVERSE DRIVE elements are insulated gate bipolar transistors (IGBTS) each having an emitter, gate and a collector;

first and second diodes;

a current sensor; and

a capacitance;

wherein the collector of the first FORWARD DRIVE IGBT is interconnected to a motor armature, the emitter of the first FORWARD DRIVE IGBT and the collector of the second REVERSE DRIVE IGBT is interconnected to the first diode, the emitter of the first REVERSE DRIVE IGBT and the collector of the second FORWARD DRIVE IGBT is interconnected to the second diode, the current sensor is interconnected to the motor armature and the first and second diodes, and the capacitance is interconnected to the first and second diodes, the current sensor, and the emitters of the second FORWARD and REVERSE DRIVE IGBTs

wherein said series motor control is configured to be interconnected with controlling logic or a processor, the field and armature of a series wound motor, and an external DC power source.

2. The solid state series motor control according to claim 1 , wherein said current sensor is configured to measure current passing through the motor armature.

3. The solid state series motor control according to claim 1 , in combination with a series wound motor having an armature and a field.

4. A solid state series motor control method comprising:

providing a solid state series motor control with first and second FORWARD DRIVE elements, first and second REVERSE DRIVE elements, first and second diodes, a current sensor, and a capacitance;

configuring the FORWARD DRIVE elements and REVERSE DRIVE elements as insulated gate bipolar transistors (IGBTs) each having an emitter, gate and a collector;

interconnecting the collector of the first FORWARD DRIVE IGBT to the motor armature;

interconnecting the emitter of the first FORWARD DRIVE IGBT and the collector of the second REVERSE DRIVE IGBT to the first diode;

interconnecting the emitter of the first REVERSE DRIVE IGBT and the collector of the second FORWARD DRIVE IGBT to the second diode;

interconnecting the current sensor to the motor armature and the first and second diodes; and

interconnecting the capacitance to the first and second diodes, the current sensor and the emitters of the second FORWARD and REVERSE DRIVE IGBTs; and

interconnecting the solid state series motor control with controlling logic or a processor, the field and armature of a series wound motor, and an external DC power source.

5. The solid state series motor control method according to claim 4 , further comprising:

driving the motor forward by gating the first and second REVERSE DRIVE IGBTs OFF;

gating the first FORWARD DRIVE IGBT ON ; and

modulating the second FORWARD DRIVE IGBT to vary the voltage and current in the motor.

6. The solid state series motor control method according to claim 4 , further comprising:

driving the motor in reverse by gating the first and second FORWARD DRIVE IGBTs OFF;

gating the first REFVERSE DRIVE IGBT ON ; and

modulating the second REVERSE DRIVE IGBT to vary the voltage and current in the motor.

7. The solid state series motor control method according to claim 4 , further comprising:

braking the motor from forward drive by gating the first and second FORWARD DRIVE IGBTs OFF;

gating the first REVERSE DRIVE IGBT ON ; and

modulating the second REVERSE DRIVE IGBT to reverse the field with respect to the armature and to control the field strength.

8. The solid state series motor control method according to claim 7 , further comprising:

generating armature current by the first REVERSE DRIVE IGBT and the second diode;

measuring the current with the current sensor; and

determining a value of the generated current by armature revolutions per minute and a value of current in the field.

9. The solid state series motor control method according to claim 4 , further comprising:

braking the motor from reverse drive by gating the first and second REVERSE DRIVE IGBTs OFF;

gating the first FORWARD DRIVE IGBT ON ; and

modulating the second FORWARD DRIVE IGBT to reverse the field with respect to the armature and to control the field strength.

10. The solid state series motor control method according to claim 9 , further comprising:

generating armature current by the first FORWARD DRIVE IGBT and the first diode;

measuring the current with the current sensor; and

determining a value of the generated current by armature revolutions per minute and a value of current in the field.