Detection of the amount of wear on a motor drive system
First Claim
Patent Images
1. A method for detecting an amount of wear on a carbon brush drive system of an electrically commutated d.c. motor, the drive system having a plurality of carbon brushes, the method comprising:
- detecting an amount of wear on at least one of the carbon brushes as a function of a time behavior of a motor voltage;
wherein the amount of wear is detected during a motor startup.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and a device, respectively, for detecting the amount of wear on the carbon brush drive system of an electrically commutated d.c. motor which is used, for example, in the form of a pump motor in a motor vehicle. The d.c. motor is driven by at least two carbon brushes and includes means for detecting the generative follow-up voltage. The amount of wear on at least one carbon brush is derived from the time behavior of the generative motor voltage and displayed to the driver.
16 Citations
16 Claims
-
1. A method for detecting an amount of wear on a carbon brush drive system of an electrically commutated d.c. motor, the drive system having a plurality of carbon brushes, the method comprising:
-
detecting an amount of wear on at least one of the carbon brushes as a function of a time behavior of a motor voltage; wherein the amount of wear is detected during a motor startup. - View Dependent Claims (2)
-
-
3. A method for detecting an amount of wear on a carbon brush drive system of an electrically commutated d.c. motor, the drive system having a plurality of carbon brushes, the method comprising:
-
detecting an amount of wear on at least one of the carbon brushes as a function of a time behavior of a motor voltage; wherein a single carbon brush is shorter than at least one other carbon brush for detecting the amount of wear on the carbon brushes. - View Dependent Claims (4)
-
-
5. A method for detecting an amount of wear on a carbon brush drive system of an electrically commutated d.c. motor, the drive system having a plurality of carbon brushes, the method comprising:
-
detecting an amount of wear on at least one of the carbon brushes as a function of a time behavior of a motor voltage; wherein one of the carbon brushes used for drive purposes is prevented from continuing operation at a preset amount of wear. - View Dependent Claims (6)
-
-
7. A device for detecting an amount of wear on a drive system of an electrically commutated d.c. motor, the d.c. motor being driven with the aid of a plurality of carbon brushes, the device comprising:
-
means for detecting a motor voltage; and an arrangement for detecting an amount of wear on at least one of the carbon brushes as a function of a time behavior of the motor voltage; wherein the amount of wear is detected during a motor startup. - View Dependent Claims (8)
-
-
9. A device for detecting an amount of wear on a drive system of an electrically commutated d.c. motor, the d.c. motor being driven with the aid of a plurality of carbon brushes, the device comprising:
-
means for detecting a motor voltage; and an arrangement for detecting an amount of wear on at least one of the carbon brushes as a function of a time behavior of the motor voltage; wherein a single carbon brush is shorter than at least one other carbon brush for detecting the amount of wear on the carbon brushes. - View Dependent Claims (10)
-
-
11. A device for detecting an amount of wear on a drive system of an electrically commutated d.c. motor, the d.c. motor being driven with the aid of a plurality of carbon brushes, the device comprising:
-
means for detecting a motor voltage; an arrangement for detecting an amount of wear on at least one of the carbon brushes as a function of a time behavior of the motor voltage; and a holder for the carbon brushes, wherein the holder of a single carbon brush is designed in such a way that an operation of the carbon brush is hindered at a preset amount of wear on the carbon brush. - View Dependent Claims (12, 13, 14, 15, 16)
-
Specification