# US 2013/0154532 A1 · Method for Moving an Element, which is Driven by an Electric Motor Inside a Predetermined Movement Section Between Two Block Positions Each Formed as a Limit Stop, into a Block Position

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- Number: US 2013/0154532 A1
- Document ID: US20130154532A1
- Status: Published application
- Kind: A1
- Application number: 13/680,192
- Filed: 2012-11-19
- Published: 2013-06-20
- Earliest claimed: 2010-05-19
- Assignees: Leopold Kostal GmbH & Co. KG
- Inventors: Stefan Otte; Matthias Steinbach
- Web page: https://patentgrep.com/patent/US20130154532A1

## CPC

- H02P 3/06: for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- E05F 15/695: Control circuits therefor
- H02P 3/08: for stopping or slowing a DC motor
- H02P 7/0094: {wherein the position is detected using the ripple of the current caused by the commutator}
- H02P 7/29: using pulse modulation
- E05Y 2400/336: of the angular type
- E05Y 2400/354: End positions
- E05Y 2400/36: Speed control, detection or monitoring
- E05Y 2800/73: Multiple functions
- E05Y 2800/74: Specific positions
- E05Y 2900/55: Windows
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF

## Abstract

A method for moving a movable element into a block position includes providing a supply voltage to an electric motor associated with the movable element for the motor to generate a motor current and drive the element with motor power dependent on the motor current in order to move the element along a path. Upon the element being moved into a block position of the path, the supply voltage provided to the motor is controlled such that the motor current generated by the motor is continuously reduced over a time period to zero. For instance, the supply voltage is pulse-width modulated at a decreasing pulse duty ratio over the time period such that the motor current generated by the motor is continuously reduced over the time period to zero.

## Claims

### Claim 1

A method for moving a movable element into a block position, the method comprising:
providing a supply voltage to an electric motor associated with the movable element for the motor to generate a motor current and drive the element with motor power dependent on the motor current in order to move the element along a path;
upon the element being moved into a block position of the path, controlling the supply voltage provided to the motor such that the motor current generated by the motor is continuously reduced over a time period to zero.

### Claim 2 (depends on 1)

The method of claim 1 wherein:
controlling the supply voltage provided to the motor includes pulse-width modulating the supply voltage provided to the motor at a decreasing pulse duty ratio over the time period such that the motor current generated by the motor is continuously reduced over the time period to zero.

### Claim 3 (depends on 2)

The method of claim 2 wherein:
the pulse duty ratio of the pulse-width modulation of the supply voltage provided to the motor is decreased linearly over the time period such that the motor current generated by the motor decreases linearly over the time period.

### Claim 4 (depends on 2)

The method of claim 2 wherein:
the pulse-width modulation of the supply voltage provided to the motor occurs at a frequency of at least 15 kHz.

### Claim 5 (depends on 2)

The method of claim 2 wherein:
the pulse duty ratio of the pulse-width modulation of the supply voltage provided to the motor is reduced according to a linear function of time from 100% to 0% over the time period.

### Claim 6 (depends on 5)

The method of claim 5 wherein:
the time period is between 50 and 200 milliseconds.

### Claim 7 (depends on 1)

The method of claim 1 further comprising:
reducing the supply voltage to the motor as the element is being moved into the block position such that the motor power for driving the element is reduced whereby motion of the element is decelerated as the element is being moved into the block position.

### Claim 8 (depends on 1)

The method of claim 1 further comprising:
detecting when the element is moved into the block position by monitoring current ripples of the motor current.

### Claim 9 (depends on 1)

The method of claim 1 wherein:
the movable element is a window pane of a vehicle.

### Claim 10 (depends on 1)

The method of claim 1 wherein:
each block position is a limit stop.

### Claim 11

A system comprising:
an electric motor associated with an element movable along a path;
a power supply for providing a supply voltage to the motor for the motor to generate a motor current and drive the element with motor power dependent on the motor current in order to move the element along the path; and
a controller configured to control the supply voltage provided to the motor such that the motor current generated by the motor is continuously reduced over a time period to zero upon the element being moved into a block position of the path.

### Claim 12 (depends on 11)

The system of claim 11 wherein:
the controller is further configured to control the supply voltage provided to the motor by pulse-width modulating the supply voltage provided to the motor at a decreasing pulse duty ratio over the time period such that the motor current generated by the motor is continuously reduced over the time period to zero.

### Claim 13 (depends on 12)

The system of claim 12 wherein:
the controller is further configured to linear decrease the pulse duty ratio of the pulse-width modulation of the supply voltage provided to the motor over the time period such that the motor current generated by the motor decreases linearly over the time period.

### Claim 14 (depends on 12)

The system of claim 12 wherein:
the controller is further configured to pulse-width modulate the supply voltage provided to the motor at a frequency of at least 15 kHz.

### Claim 15 (depends on 12)

The system of claim 12 wherein:
the controller is further configured to reduce the pulse duty ratio of the pulse-width modulation of the supply voltage provided to the motor according to a linear function of time from 100% to 0% over the time period.

### Claim 16 (depends on 15)

The system of claim 15 wherein:
the time period is between 50 and 200 milliseconds.

### Claim 17 (depends on 11)

The system of claim 11 wherein:
the controller is further configured to reduce the supply voltage to the motor as the element is being moved into the block position such that the motor power for driving the element is reduced whereby motion of the element is decelerated as the element is being moved into the block position.

### Claim 18 (depends on 11)

The system of claim 11 wherein:
the controller is further configured to detect when the element is moved into the block position by monitoring current ripples of the motor current.

### Claim 19 (depends on 11)

The system of claim 11 wherein:
the movable element is a window pane of a vehicle.

### Claim 20 (depends on 11)

The system of claim 11 wherein:
each block position is a limit stop.