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Electronically commutated direct current machine sensor-less operation

A DC motor and electronic commutation technology, which is applied in the direction of electronic commutator, electronic commutation motor control, electrical components, etc., can solve the problems of inapplicability and cannot be used to determine the rotor position, and achieve the effect of reducing the number

Active Publication Date: 2013-01-02
SAURER GERMANY GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem here is that due to the demagnetization process and due to disturbances such as electrostatic discharges, the resulting zero crossings are not relevant zero crossings for this induced voltage, since they are not induced in the stator windings by the rotating field of the rotor, so Also cannot be used to determine rotor position
[0005] This approach is completely unsuitable for rotational speeds significantly greater than 100,000 revolutions per minute, such as occur in rotor drives of open-end spinning machines

Method used

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  • Electronically commutated direct current machine sensor-less operation
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  • Electronically commutated direct current machine sensor-less operation

Examples

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Embodiment Construction

[0040] figure 1 A schematic diagram of an electronic drive according to the invention with an electronically commutated DC motor 11 is shown. The motor 11 consists of three-phase current windings in the stator and a permanent magnet excitation rotor. The connections of the three phases A, B and C are connected to the inverter 12 . The inverter is connected to a DC voltage source. DC voltage source at figure 1 is represented by capacitor 15 and is connected to terminals 13 and 14 of the inverter. The inverter is controlled by the control unit 16 , and the inverter and the control unit are connected to each other by a control line 17 . Measurement lines 18 connect the control device 16 to the three phases A, B and C to measure the induced voltage.

[0041] figure 2 The principle structure of the inverter 12 with the DC voltage connections 13 and 14 and the phase connections A, B and C is shown. The inverter is a three-phase bridge circuit with switches T0 to T5. The swi...

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Abstract

The method involves determining zero crossings of a voltage induced by a rotating field of a rotor in a non-powered phase. The time point of next zero crossing of the voltage is predetermined by using a control device (16), and a time interval is calculated according to the predetermined time point of the last detected zero-crossing. A sampling rate of the voltage is adjusted according to an actual step time that is calculated from the time difference between the determined zero crossing and last determined zero crossing of the voltage. An independent claim is also included for an electrical drive comprising an electronically commutated direct current machine.

Description

technical field [0001] The invention relates to a method for the sensorless operation of an electronically commutated direct current machine, in which the zero crossing of the voltage induced by the rotating field of the rotor is determined in the phases in which no current is supplied, and to a method with electronically commutated Electronic drives to DC motors, inverters and controls configured for sensorless operation of the motor and for determining the zero crossings of the voltage induced by the rotating field of the rotor in phases where no current is supplied. Background technique [0002] Electronically commutated DC motors are gradually replacing traditional DC motors with mechanical commutators and are used as drives in the automotive sector, household equipment and industrial applications. An electronically commutated DC motor is concerned with constructing a permanent magnet excitation synchronous motor that obtains the performance of a DC motor in association ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/18
CPCH02P6/182
Inventor 努尔-埃丁·巴勒布勒斯文·梅尔坎普
Owner SAURER GERMANY GMBH & CO KG
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