# US 8,569,987 B2 · Configurable multi-axis electric drive system concept

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- Number: US 8,569,987 B2
- Document ID: US8569987B2
- Status: Granted
- Kind: B2
- Application number: 12/887,331
- Filed: 2010-09-21
- Published: 2012-03-22
- Granted: 2013-10-29
- Earliest claimed: 2010-09-21
- Assignees: Rockwell Automation Technologies, Inc.
- Applicants: Craig R. Winterhalter
- Inventors: Craig R. Winterhalter
- Web page: https://patentgrep.com/patent/US8569987B2

## CPC

- H02P 21/0089: {using field weakening}
- H02P 27/06: using DC to AC converters or inverters (H02P27/05 takes precedence)
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS

## Abstract

The present invention includes techniques for configuring an electric drive module designed for various multi-axis drive system configurations. Embodiments include techniques for integrating a three phase dual converter with a diode bridge and drive controller within a single drive module. Further integrating the diode bridge directly within the drive module may result in an integrated, modular building block for multiple electric drive system configurations. In some embodiments, multiple electric drive modules are connected by a DC bus to form a system configured for higher energy efficiency.

## Claims

### Claim 1

A drive module, comprising:
a printed circuit board (PCB);
a dual converter comprising a first converter and a second converter disposed directly on the PCB;
a power module input coupled to the PCB;
a first power module output and a second power module output from the first converter, wherein the first power module output is coupled to the second converter; and
a third power module output from the second converter, wherein the drive module is configured for either a dual axis configuration, a 2pu single axis configuration, a regenerative bus supply configuration, a 2pu regenerative bus supply configuration, a regenerative braking configuration, a shared AC/DC configuration or any combination thereof.

### Claim 2 (depends on 1)

The module of claim 1, comprising a controller configured to control an operation of the dual converter.

### Claim 3 (depends on 2)

The module of claim 2, wherein the controller is configured to control a current and a voltage driven by the dual converter.

### Claim 4 (depends on 2)

The module of claim 2, wherein the controller is configured to control the dual converter based on an application of the drive module.

### Claim 5 (depends on 2)

The module of claim 2, wherein the controller is configured to control the dual converter based on one or more of a desired current, voltage and power output by the first converter or the second converter.

### Claim 6 (depends on 1)

The module of claim 1, wherein one or more of the second power module output or the third power module output is capable of bidirectional power flow.

### Claim 7 (depends on 6)

The module of claim 6, wherein one or more of the second power output or the third power module output is capable outputting electromagnetic energy for storage.

### Claim 8 (depends on 1)

The module of claim 1, wherein the second power module output from the first converter and the third power module output from the second converter are capable of being connected to a single motor.

### Claim 9 (depends on 1)

The module of claim 1, wherein the second power module output from the first converter is capable of being connected to a first motor and the third power module output from the second converter is capable of being connected to a second motor.

### Claim 10 (depends on 1)

The module of claim 1, wherein the second converter is configured to connect to another drive module.

### Claim 11 (depends on 1)

The module of claim 1, wherein the second converter is configured to connect to another dual converter.

### Claim 12 (depends on 1)

The module of claim 1, wherein the drive module is configured to share a DC bus connection with other modules.

### Claim 13 (depends on 1)

The module of claim 1, wherein the drive module comprises a diode bridge coupled to and one or more of the first converter and the second converter.

### Claim 14 (depends on 1)

The module of claim 1, wherein the first converter and the second converter comprise the same configuration.

### Claim 15 (depends on 1)

The module of claim 1, wherein the first converter comprises a first rectifier coupled to a first inverter, wherein the first rectifier is configured to convert a first alternating current (AC) voltage into a first direct current (DC) voltage, and wherein the first inverter is configured to convert the first DC voltage into a first discretized AC voltage; and
wherein the second converter comprises a second rectifier coupled to a second inverter, wherein the second rectifier is configured to convert the first discretized AC voltage into a second DC voltage, and wherein the second inverter is configured to convert the second DC voltage into a second discretized AC voltage.

### Claim 16

A dual converter module, comprising:
a modular substrate;
a power input/output (I/O) coupled to the modular substrate;
a first converter disposed directly over the modular substrate and coupled to the power I/O, wherein the first converter comprises a first power output and a second power output;
a second converter disposed directly over the modular substrate, wherein the first power output is coupled to the second converter, wherein the second converter comprises a third power output; and
a controller configured to substantially control operation of the first converter and the second converter, wherein the dual converter module is configured for a dual axis configuration.

### Claim 17 (depends on 16)

The dual converter module of claim 16, comprising a rectifier comprising a diode bridge configured to convert an AC current from a power source to a DC current input to the first converter.

### Claim 18 (depends on 17)

The dual converter module of claim 17, wherein the second output is configured to drive power to a first motor or return power to a power source connected to the rectifier.

### Claim 19 (depends on 17)

The dual converter module of claim 17, wherein the third power output is configured to drive power to a second motor or return power to a power source connected to the rectifier.

### Claim 20 (depends on 16)

The dual converter module of claim 16, wherein the dual converter module is configured to be bussed with other dual converter modules.

### Claim 21 (depends on 16)

The dual converter module of claim 16, wherein the first converter and the second converter are configured to share a common DC bus.

### Claim 22

A dual converter module, comprising:
a modular substrate;
a power input/output (I/O) coupled to the modular substrate;
a first converter disposed directly over the modular substrate and coupled to the power I/O, wherein the first converter comprises a first power output and a second power output;
a second converter disposed directly over the modular substrate, wherein the first power output is coupled to the second converter, wherein the second converter comprises a third power output, wherein the second power output is coupled to the third power output, wherein the coupled second and third power outputs are configured to couple to a motor; and
a controller configured to substantially control operation of the first converter and the second converter.

### Claim 23

A dual converter module, comprising:
a modular substrate;
a power input/output (I/O) coupled to the modular substrate;
a first converter disposed directly over the modular substrate and coupled to the power I/O, wherein the first converter comprises a first power output and a second power output;
a second converter disposed directly over the modular substrate, wherein the first power output is coupled to the second converter, wherein the second converter comprises a third power output, wherein the second power output is configured to couple to an alternating current (AC) power source and the third power output is configured to couple to a motor; and
a controller configured to substantially control operation of the first converter and the second converter.

### Claim 24

A dual converter module, comprising:
a modular substrate;
a power input/output (I/O) coupled to the modular substrate;
a first converter disposed directly over the modular substrate and coupled to the power I/O, wherein the first converter comprises a first power output and a second power output;
a second converter disposed directly over the modular substrate, wherein the first power output is coupled to the second converter, wherein the second converter comprises a third power output, wherein the second power output is coupled to the third power output, wherein the coupled second and third power outputs are configured to couple to an alternating current (AC) power source; and
a controller configured to substantially control operation of the first converter and the second converter.

### Claim 25

A dual converter module, comprising:
a modular substrate;
a power input/output (I/O) coupled to the modular substrate;
a first converter disposed directly over the modular substrate and coupled to the power I/O, wherein the first converter is configured to receive alternating current (AC) power from an AC power source, wherein the first converter comprises a first power output and a second power output;
a second converter disposed directly over the modular substrate, wherein the first power output is coupled to the second converter, wherein the second converter comprises a third power output, wherein the second power output is configured to couple to the AC power source, and wherein the third power output is configured to couple to a motor; and
a controller configured to substantially control operation of the first converter and the second converter.

### Claim 26

A dual converter module, comprising:
a modular substrate comprising:
a first power input, wherein the first power input is configured to receive three-phase alternating current (AC) power from a three-phase AC power source; and
a second power input, wherein the second power input is configured to receive the three-phase alternating current (AC) power from the three-phase AC power source;
a first converter disposed directly over the modular substrate and coupled to the I/O three-phase AC power source via the first power input, wherein the first converter comprises a first power output and a second power output;
a second converter disposed directly over the modular substrate and coupled to the three-phase AC power source via the second power input, wherein the first power output is coupled to the second converter, wherein the second converter comprises a third power output, wherein the second power output is configured to couple to a first motor, and wherein the third power output is configured to couple to a second motor; and
a controller configured to substantially control operation of the first converter and the second converter.