CONTROL METHOD FOR THE ACCERLATION OF A VACUUM PUMP, IN WHICH METHOD THE INPUT CURRENT OF THE CONTROL DEVICE IS LIMITED

• US 20160290349A1
• Filed: 11/13/2014
• Published: 10/06/2016
• Est. Priority Date: 11/14/2013
• Status: Abandoned Application

• Current Assignee: Leybold GmbH (Atlas Copco AB)
• Original Assignee: Oerlikon Leybold Vacuum GmbH (Atlas Copco AB)
• Inventors: Liessmann, Markus
• Application Number:
  US15/035,893
• Publication Number:
  US 20160290349A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F04D 19/04 specially adapted to the production of a high vacuum, e.g. molecular pumps
• CPC Class Codes: F04D 25/06 the pump being electrically driven F04D25/08 takes precedence
• CPC Class Codes: F04D 27/004 by varying driving speed
• CPC Class Codes: F04D 27/0261 by varying driving speed
• CPC Class Codes: F05D 2260/85 Starting
• CPC Class Codes: H02P 23/009 using field weakening
• CPC Class Codes: H02P 6/20 Arrangements for starting H02P6/08 takes precedence
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

A control method for an acceleration of a vacuum pump, in particular a turbomolecular pump, having an electric motor and a control device in which, in a first acceleration phase, the input current of the control device increases up to a maximum value Is,max and, in a second acceleration phase, the control device is operated at the maximum value Is,max of the input current.

Claims

1. Control method for an acceleration of a vacuum pump, in particular a turbomolecular pump, having an electric motor and a control device, in which

in a first acceleration phase, the input current of the control device increases up to a maximum value I_s,max and

in a second acceleration phase, the control device is operated at the maximum value I_s,max of the input current.

2. Control method of claim 1, wherein the rated speed n_max of the vacuum pump is reached at the end of the second acceleration phase.

3. Control method of claim 2, wherein the input current of the control device decreases to an operating value after the second acceleration phase.

4. Control method of one of claims 1 to 3, wherein, in the first acceleration phase, the input current of the control device increases, in particular in a constant manner, to the maximum value I_s,max.

5. Control method of claim 4, wherein the input current of the control device reaches the maximum value I_s,max at the end of the first acceleration phase.

6. Control method of one of claims 1 to 5, wherein the motor current is constant during the first acceleration phase, the motor current in particular having a constant maximum value I_s,max.

7. Control method of one of claims 1 to 6, wherein the motor current decreases during the second acceleration phase.

8. Control method of one of claims 1 to 7, wherein the motor current decreases to an operating value after the second acceleration phase.

9. Control method of one of claims 1 to 8, wherein the rotational speed of the vacuum pump increases in the first acceleration phase and in the second acceleration phase.

10. Control method of claim 9, wherein the rotational speed of the vacuum pump increases faster in the first acceleration phase than in the second acceleration phase.