Control unit

• US 20070147807A1
• Filed: 07/09/2004
• Published: 06/28/2007
• Est. Priority Date: 07/22/2003
• Status: Abandoned Application

• Current Assignee: Elodrive GmbH Stellantriebstechnik
• Original Assignee: Elodrive GmbH Stellantriebstechnik
• Inventors: Buchholz, Bernd, Palm, Dieter, Schunke, Kurt
• Application Number:
  US10/565,025
• Publication Number:
  US 20070147807A1
• Time in Patent Office: Days
• US Class Current: 388/801
• CPC Class Codes: H02H 7/16 for capacitors for synchronous capacitors H02H7/06
• CPC Class Codes: H02P 7/28 using semiconductor devices

Abstract

A control unit for an electric motor of an actuator. The control unit including a controller, a capacitive energy storage device having a charge voltage, a temperature sensor to measure an ambient temperature, and a charge converter.

Claims

1. A control unit for an electric motor of an actuator, the control unit comprising:

a controller;

a capacitive energy storage device chargeable by a supply network to supply power to the electric motor in the event of a power failure, the capacitive energy storage device having a charge voltage;

a temperature sensor assigned to the control unit to measure an ambient temperature; and

a charge converter configured to convert the measured ambient temperature into a control signal to control the charge voltage of the capacitive energy storage device as a function of the measured ambient temperature.

2. The control unit according to claim 1, wherein an operational voltage for the capacitive energy storage device is controlled by the charge converter as a function of the measured ambient temperature to an approximately constant value.

3. The control unit according to claim 1 or 2, wherein the capacitive energy storage device is continuously acted upon by the operational voltage.

4. The control unit according to claim 1, wherein the temperature sensor is integrated in the controller of the control unit.

5. The control unit according to claim 1, wherein the capacitive energy storage device is acted upon by electric energy from an electric motor circuit.