Control device for an electric motor
First Claim
1. An electrical tool comprising:
- a handle shell,a device for driving an electric motor, the device being arranged within the handle shell of the electrical tool and comprising;
at least one power semiconductor for controlling an electrical voltage applied to the electric motor;
a control circuit for controlling the at least one power semiconductor, the control circuit comprising electrical components and conductor tracks for connecting the electrical components;
a mounting plate in the form of a printed circuit board, at least a portion of the control circuit being mounted on the mounting plate; and
a mount element mounted on the mounting plate and having at least one surface projecting approximately perpendicularly from the mounting plate, the at least one power semiconductor being arranged on the at least one surface of the mount element, wherein the device reduces wiring complexity within the electrical tool.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a drive device for an electric motor, in particular for a brushless DC motor in an electrical tool, which is powered by a rechargeable battery. The drive device has at least one power semiconductor, in particular for controllable application of an electrical voltage to the electric motor, a control circuit for controlling the power semiconductor, and a mounting plate which, for example, is in the form of a printed circuit board. At least one portion of the control circuit, in particular electrical and/or electronic components as well as the conductor tracks (which connect the electrical and/or electronic components) of the control circuit, is arranged on the mounting plate. The power semiconductor is arranged on the mounting plate and/or on a mount element, which is mounted on the mounting plate.
48 Citations
28 Claims
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1. An electrical tool comprising:
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a handle shell, a device for driving an electric motor, the device being arranged within the handle shell of the electrical tool and comprising; at least one power semiconductor for controlling an electrical voltage applied to the electric motor; a control circuit for controlling the at least one power semiconductor, the control circuit comprising electrical components and conductor tracks for connecting the electrical components; a mounting plate in the form of a printed circuit board, at least a portion of the control circuit being mounted on the mounting plate; and a mount element mounted on the mounting plate and having at least one surface projecting approximately perpendicularly from the mounting plate, the at least one power semiconductor being arranged on the at least one surface of the mount element, wherein the device reduces wiring complexity within the electrical tool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13)
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8. The electrical tool as claimed in 7, wherein the capacitors of the control circuit are arranged on the mounting plate, the capacitors being located between at least one of (a) the at least one power semiconductor and the plug contacts and (b) the mount element and the plug contacts.
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14. An electrical tool comprising:
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a handle shell; a device for driving an electric motor, the device being arranged within the handle shell of the electrical tool and comprising; at least one power semiconductor for controlling an electrical voltage applied to the electric motor; a control circuit for controlling the at least one power semiconductor, the control circuit comprising electrical components and conductor tracks for connecting the electrical components; a mounting plate comprising a metal part with a surface facing the electrical components and the conductor tracks, at least a portion of the control circuit being mounted on the mounting plate; and an insulating coating provided on the surface of the metal part, wherein the electrical components and the conductor tracks are located on the coating and the metal part constitutes a heat sink; and a mount element mounted on the mounting plate, wherein a surface of the mount element projects approximately perpendicularly from the mounting plate and the at least one power semiconductor is arranged on the surface of the mount element, wherein the device reduces wiring complexity within the electrical tool. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27)
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23. The electrical tool as claimed in 22, wherein the capacitors of the control circuit are arranged on the mounting plate, the capacitors being located between at least one of (a) the at least one power semiconductor and the plug contacts and (b) the mount element and the plug contacts.
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28. A device for driving an electric motor, comprising:
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at least one power semiconductor for controlling an electrical voltage applied to the electric motor; a control circuit for controlling the at least one power semiconductor, the control circuit comprising electrical components and conductor tracks for connecting the electrical components; a mounting plate comprising a metal part with a surface facing the electrical components and the conductor tracks, at least a portion of the control circuit being mounted on the mounting plate; an insulating coating provided on the surface of the metal part, wherein the electrical components and the conductor tracks are located on the coating and the metal part constitutes a heat sink; a sensor element in the form of at least one of a potentiometer, a Hall element, and a magnetoresistive element, the sensor element being located on the mounting plate and adapted to produce a nominal value supplied to the control circuit to set an associated rotation speed for the electric motor, the sensor element being arranged in a housing of an electrical switch; an operating member for the sensor element, the operating member being in the form of a push button and being arranged on the housing of the switch; and a contact system for switching the voltage supply for at least one of the electric motor and the control circuit, the contact system being arranged in the electrical switch, the contact system being capable of operating by means of the operating member.
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Specification