GB2334826A - Mounting control apparatus on an electric motor - Google Patents

Mounting control apparatus on an electric motor Download PDF

Info

Publication number
GB2334826A
GB2334826A GB9804070A GB9804070A GB2334826A GB 2334826 A GB2334826 A GB 2334826A GB 9804070 A GB9804070 A GB 9804070A GB 9804070 A GB9804070 A GB 9804070A GB 2334826 A GB2334826 A GB 2334826A
Authority
GB
United Kingdom
Prior art keywords
electric motor
control apparatus
switching device
control module
stator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9804070A
Other versions
GB9804070D0 (en
Inventor
Dirk Stephaan Dreesen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motors Liquidation Co filed Critical Motors Liquidation Co
Priority to GB9804070A priority Critical patent/GB2334826A/en
Publication of GB9804070D0 publication Critical patent/GB9804070D0/en
Priority to DE19907515A priority patent/DE19907515A1/en
Publication of GB2334826A publication Critical patent/GB2334826A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
    • H02K11/026—Suppressors associated with brushes, brush holders or their supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
    • H02K11/028—Suppressors associated with the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

Control apparatus (20) comprising an electric motor (22) having a stator (28); and a power control module (24) for supplying controlled power to the electric motor and having a switching device (30); wherein the power control module is mounted on the electric motor with the switching device mounted on the stator. Reduces wiring complexity and removes need for a separate heatsink for the switching device. Also reduces the emitted electromagnetic energy.

Description

CONTROL APPARATUS Technical Fleld The present invention relates to control apparatus including an electric motor and a power control module.
Background of the Invention It is known to mount the electric blower motor for the passenger heating/cooling system of a motor vehicle in an opening in an air duct in the system. The blower fan is positioned inside the air duct, with the stator of the motor extending through the opening and out of the duct. The power control module for the electric motor is mounted on a wall of the air duct and has a heat sink which is positioned inside the duct. The power control module includes a switching device which is cooled by the passage of air across the heats ink. The power control module receives power and control signals from a suitable control system and supplies power to the electric motor in accordance with the control signals. Such a known arrangement is shown in EP-A-0385766. EP-A-0385766 and US-A-5322471 also disclose arrangements where the switching device is mounted on the wall of the air duct and cooled by the passage of air through the duct. These known arrangements require the use of a heatsink, and/or a wiring harness and associated connectors between the power control module and the electric motor, a housing for the power control module, and electric components to reduce the risk of radio interference, and also disturb the air flow through the duct.
Summarv of the Invention It is an object of the present invention to provide an arrangement which is an improvement over the above described known arrangements.
Control apparatus in accordance with the present invention comprises an electric motor having a stator; and a power control module for supplying controlled power to the electric motor and having a switching device; wherein the power control module is mounted on the electric motor with the switching device mounted on the stator.
The present invention provides for the switching device of the power control module to be mounted directly on the stator of the electric motor. The stator acts as a heatsink for the switching device. Also, mounting the power control module on the electric motor removes the need for a wiring harness between the power control module and the electric motor and for connectors associated with the wiring harness. This arrangement also reduces or removes the risk of radio interference being generated. The present invention has particular application in the heating/cooling system or air conditioning system for the passenger compartment of a motor vehicle. In this case, the removal of components from within the air duct of the system reduces the risk of the creation of air flow turbulence in the air passing through the duct.
Brief Description of the Drawings The present invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a cross-sectional view of part of an air conditioning system of a motor vehicle having control apparatus in accordance with the present invention; and Figure 2 is circuit diagram of the control apparatus of Figure 1.
Description of the Preferred Embodiment Part of an air conditioning system 10 for a motor vehicle is shown in Figure 1. The system 10 includes an air duct 12 having an inlet 14 and an outlet 16. The control apparatus 20 of the present invention comprises an electric blower motor 22 and a power control module 24. The electric blower motor 22 is a DC electric motor. The electric blower motor 22 is mounted in an opening 18 in the air duct 12 and includes a fan 26 positioned inside the air duct and a stator 28 which extends through the opening. The power control module 24 is mounted on the electric motor 22 and includes a switching device 30 which is mounted directly on the stator 28 of the electric motor 22 and which is also mounted on a circuit board 32 and electrically connected to other electric components of the power control module on the circuit board.
As shown in Figure 2, the electric circuit of the control apparatus 20 comprises the resistance 34 and inductance 36 of the electric motor 22, the brushes 38 of the electric motor, the switching device 30 of the power control module 24, and radio interference suppression components such as a pair of chokes 40,42 and a capacitor 44. The chokes 40,42 and capacitor 44 are mounted on the circuit board 32. The power control module 24 receives power and control signals from a control system 46 mounted elsewhere in the motor vehicle, and controls the supply of power to the electric motor dependent on the control signals, which are preferably pulse width modulated signals, from the control system. The switching device 30 is preferably a power semiconductor device such as a power transistor. In this case, the collector of the transistor is connected to one motor brush 38, the emitter of the transistor is connected to the control system 46 by way of one of the chokes 40, the base of the transistor is connected to the control system, the other choke 42 is connected between the other motor brush and the control system, and the capacitor 44 is connected across power lines.
As the power control module 24 is mounted directly on the electric motor 22, there is no need for a wiring harness and associated connectors between the power control module and the electric motor, and hence the present invention reduces wiring complexity when compared to previously known arrangements. Also, removing this wiring harness reduces the emitted electromagnetic energy, thereby enabling a reduction in the number of components to suppress such interference. The stator 28 of the electric motor 22 acts as the heatsink for the switching device 30, removing the need for a separate heats ink. Mounting the power control module 24 and its switching device 30 on the electric motor 22 means that no components protrude into the air duct 12, reducing the risk of air turbulence in the air flow through the duct. Also, there is no need for an additional housing for the power control module 24.
The proximity of the switching device 30 relative to the EMC suppress ion chokes 4042 of the electric motor 22 permit a further reduction of emitted electromagnetic energy by arranging the switching device 30 and the suppression chokes 40-42 electrically as in Figure 2, or by using the electric motor stator 28 as an electromagnetic shield that encapsulates the switching device 30 and the suppression chokes 4042.

Claims (6)

Claims
1. Control apparatus comprising an electric motor having a stator; and a power control module for supplying controlled power to the electric motor and having a switching device; wherein the power control module is mounted on the electric motor with the switching device mounted on the stator.
2. Control apparatus as claimed in Claim 1, wherein the power control module includes a circuit board which is secured to the electric motor with the switching device mounted on the circuit board and on the stator.
3. Control apparatus as claimed in Claim 2, wherein radio interference suppression components are mounted on the circuit board.
4. Control apparatus as claimed in any one of Claims 1 to 3, wherein the switching device is a power semiconductor.
5. Control apparatus as claimed in any one of Claims 1 to 4, wherein the electric motor is a blower motor of a heating/cooling system or air conditioning system of a passenger compartment of a motor vehicle, the blower motor having a fan positionable inside an air duct of the system with the stator and power control module positionable outside or inside the air duct.
6. Control apparatus substantially as herein described with reference to, and as shown in, the accompanying drawings.
GB9804070A 1998-02-27 1998-02-27 Mounting control apparatus on an electric motor Withdrawn GB2334826A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9804070A GB2334826A (en) 1998-02-27 1998-02-27 Mounting control apparatus on an electric motor
DE19907515A DE19907515A1 (en) 1998-02-27 1999-02-22 Power control module for supplying controlled power to an electric motor of a motor vehicle's air conditioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9804070A GB2334826A (en) 1998-02-27 1998-02-27 Mounting control apparatus on an electric motor

Publications (2)

Publication Number Publication Date
GB9804070D0 GB9804070D0 (en) 1998-04-22
GB2334826A true GB2334826A (en) 1999-09-01

Family

ID=10827632

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9804070A Withdrawn GB2334826A (en) 1998-02-27 1998-02-27 Mounting control apparatus on an electric motor

Country Status (2)

Country Link
DE (1) DE19907515A1 (en)
GB (1) GB2334826A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104979966A (en) * 2015-06-19 2015-10-14 中山顺富节能科技有限公司 Motor energy-saving system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1207666A (en) * 1966-11-07 1970-10-07 Skil Corp Dynamo electric machine
EP0151935A1 (en) * 1984-01-26 1985-08-21 Institut Cerac S.A. Starting device
US5119466A (en) * 1989-05-24 1992-06-02 Asmo Co., Ltd. Control motor integrated with a direct current motor and a speed control circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1207666A (en) * 1966-11-07 1970-10-07 Skil Corp Dynamo electric machine
EP0151935A1 (en) * 1984-01-26 1985-08-21 Institut Cerac S.A. Starting device
US5119466A (en) * 1989-05-24 1992-06-02 Asmo Co., Ltd. Control motor integrated with a direct current motor and a speed control circuit

Also Published As

Publication number Publication date
GB9804070D0 (en) 1998-04-22
DE19907515A1 (en) 1999-09-09

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)