Apparatus with motor winding resistance measurement and method for controlling such an apparatus
First Claim
1. An apparatus for ejecting a fluid, the apparatus comprising:
- an electric motor comprising at least one motor winding;
a control unit for controlling the motor; and
an electronic detection circuitry configured to determine an electrical quantity, the electrical quantity being a function of the electric resistance (Rw) of the motor winding, wherein the control unit is configured to control the motor as a function of the electrical quantity, wherein the electronic detection circuitry comprises an analogue digital converter configured to convert the electrical quantity from an analogue signal to a digital signal, wherein the analogue digital converter has a discrete number range of possible outputs and wherein the analogue digital converter is configured such that a middle number of the number range is output for an analogue signal of the electrical quantity for a motor winding temperature between 10°
C. and 40°
C.
1 Assignment
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Accused Products
Abstract
The invention relates to an apparatus, in particular for ejecting a fluid, having an electric motor (500), the motor comprising at least one motor winding (506a-d), having a control unit (656) for controlling the motor (500), wherein the apparatus further comprises an electronic detection circuitry (620) configured to determine an electrical quantity, the electrical quantity being a function of the electric resistance (Rw) of the motor winding (506a-d), and wherein the control unit (656) is configured to control the motor (500) as a function of the electrical quantity. The invention further relates to a method for controlling such an apparatus, comprising the steps of: determining an electrical quantity, the electrical quantity being a function of the electric resistance (Rw) of the motor winding (506a-d); and controlling the motor (500) as a function of the electrical quantity.
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Citations
14 Claims
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1. An apparatus for ejecting a fluid, the apparatus comprising:
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an electric motor comprising at least one motor winding; a control unit for controlling the motor; and an electronic detection circuitry configured to determine an electrical quantity, the electrical quantity being a function of the electric resistance (Rw) of the motor winding, wherein the control unit is configured to control the motor as a function of the electrical quantity, wherein the electronic detection circuitry comprises an analogue digital converter configured to convert the electrical quantity from an analogue signal to a digital signal, wherein the analogue digital converter has a discrete number range of possible outputs and wherein the analogue digital converter is configured such that a middle number of the number range is output for an analogue signal of the electrical quantity for a motor winding temperature between 10°
C. and 40°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for controlling an apparatus, wherein the apparatus comprises:
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an electric motor comprising at least one motor winding; a control unit for controlling the motor; and an electronic detection circuitry comprising an analogue digital converter configured to convert the electrical quantity from an analogue signal to a digital signal, wherein the analogue digital converter has a discrete number range of possible outputs and wherein the analogue digital converter is configured such that a middle number of the number range is output for an analogue signal of the electrical quantity for a motor winding temperature between 10°
C. and 40°
C.,wherein the method comprises; determining an electrical quantity, the electrical quantity being a function of the electric resistance (Rw) of the motor winding, the electrical quantity received as an analogue signal; converting the analogue signal into a digital signal; and controlling the motor as a function of the digital signal. - View Dependent Claims (14)
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Specification