Direct current motor with transistorized power supply

• US 3,274,471 A
• Filed: 09/01/1964
• Issued: 09/20/1966
• Est. Priority Date: 07/05/1963
• Status: Expired due to Term

• Current Assignee: Helmut Moczala
• Original Assignee: Helmut Moczala
• Inventors: HELMUT MOCZALA
• Application Number:
  US04/393,572
• Time in Patent Office: 749 Days
• US Class Current: 318/400.37
• CPC Class Codes: H02K 29/12 using detecting coils using the machine windings as detecting coil
• CPC Class Codes: H02P 6/06 Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
• CPC Class Codes: H02P 6/08 Arrangements for controlling the speed or torque of a single motor H02P6/10, H02P6/28 take precedence
• CPC Class Codes: H02P 6/10 Arrangements for controlling torque ripple, e.g. providing reduced torque ripple

Claims

5. IN A D.C. MOTOR HAVING A STATOR AND A ROTOR, ARMATURE WINDINGS, A POWER SUPPLY, ARMATURE TRANSISTORS CONNECTING THE POWER SUPPLY TO THE ARMATURE WINDINGS, A CONTROL CIRCUIT CONNECTED TO THE ARMATURE TRANSISTORS FOR CONTROLLING THE SAME IN DEPENDENCE UPON THE RELATIVE ANGULAR POSITION BETWEEN THE STATOR AND ROTOR, THE CONTROL CIRCUIT INCLUDING AN OSCILLATORY CIRCUIT INCORPORTATING A CONTROL TRANSISTOR, AND SPEED REGULATING MEANS CONNECTED TO THE CONTROL CIRCUIT FOR APPLYING THERETO A TACHOMETER POTENTIAL, DEPENDENT ON THE ROTATIONAL SPEED OF THE MOTOR WHICH RENDERS THE CONTROL CIRCUIT INEFFECTIVE AT A GIVEN PREDETERMINED ROTATIONAL SPEED, THE IMPROVEMENT THAT SAID TACHOMETER POTENTIAL IS DERIVED FROM SAID ARMATURE WINDINGS WHILE THE SAME ARE BLOCKED FROM SAID POWER SUPPLY BY SAID ARMATURE TRANSISTORS.