Integrated circuit for controlling an electric motor
AssigneeMicronas GmbH
InventorsJörg Franke, Klaus Heberle
Life of this patent
Estimating the term…
Abstract
An integrated circuit for controlling an electric motor, which has a primary component with a coil and a permanently magnetic secondary component cooperatively connected via an air gap to the primary component, has a semiconductor substrate in which are integrated a microcontroller and/or a pre-amplifier for controlling the coil of the electric motor. For detecting the position of the permanently magnetic secondary component, at least two magnetic field sensors with their measurement axes aligned crosswise relative to each other are integrated in the semiconductor substrate.
Claims17
An integrated circuit for controlling an electric motor, which electric motor has a primary component with a coil and a permanently magnetic secondary component displaceable relative to and cooperatively connected to the primary component via an air gap, the integrated circuit comprising a semiconductor substrate in which are integrated a microcontroller and/or a pre-amplifier for controlling the coil of the electric motor, wherein, for detecting the position of the permanently magnetic secondary component, at least two magnet field sensors with their measurement axes aligned crosswise relative to each other are integrated in the semiconductor substrate, wherein the at least two magnet field sensors and the microcontroller are formed completely within the semiconductor substrate, and wherein at least one of the magnet field sensors is a vertical hall sensor that is formed vertically with respect to an upper surface of the semiconductor substrate.
An integrated circuit for controlling an electric motor, which electric motor has a primary component with a coil and a permanently magnetic secondary component displaceable relative to and cooperatively connected to the primary component via an air gap, the integrated circuit comprising:
- a semiconductor substrate in which are integrated a microcontroller and/or a pre-amplifier for controlling the coil of the electric motor, wherein, for detecting the position of the permanent magnetic secondary component, at least two magnet field sensors with their measurement axes aligned crosswise relative to each other are integrated in the semiconductor substrate;
- and
- adjustable compensation means for the magnetic field sensors, wherein the microcontroller has a reference value memory in which reference values for the measurement signals are stored, the microcontroller is switchable to an operation mode and to a compensation mode, and in the compensation mode the electric motor is displaceable via the microcontroller into at least one reference position allocated to the reference values, and furthermore in the compensation mode the compensation means are control-connected to the microcontroller so that the measurement signals residing in the measurement signal output ports of the magnetic field sensors essentially correspond to the reference values.
An integrated circuit for controlling an electric motor, which electric motor has a primary component with a coil and a permanently magnetic secondary component displaceable relative to and cooperatively connected to the primary component via an air gap, the integrated circuit comprising a semiconductor substrate in which are integrated a microcontroller and/or a pre-amplifier for controlling the of the electric motor, wherein, for detecting the position of the permanently magnetic secondary component, at least two magnet field sensors with their measurement axes aligned crosswise relative to each other are integrated in the semiconductor substrate,
- wherein reference values for disturbance variables are stored in the reference value memory,
- wherein the integrated circuit has at least one sensor for capturing a disturbance variable, and
- wherein the sensor is connected to the reference value memory and/or the microcontroller so that in the compensation mode the measurement signals of the magnetic field sensors are calibrated with the reference values allocated to respective ones of said disturbance variables.
Dependencies are inferred from the claim text.