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AssigneeMagna Powertrain Bad Homburg GmbH
InventorDierk ORTMANN
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A blockage detector for detecting a blocked state of an electrical machine has: a first power determiner and a second power determiner for determining a first power consumption and a second power consumption of the electrical machine while a first phase voltage and a second phase voltage for operating at a first rotating field speed and a second rotating field speed are applied to the electrical machine, a quotient former for producing a power quotient between the first power consumption and the second power consumption; and a comparator for comparing the power quotient with a threshold value for the power quotient. The invention also relates to an inverter controller, an inverter, a drive, ventilation or air-conditioning system and a vehicle having a blockage detector according to the invention. In addition, the invention relates to a corresponding method for detecting a blocked state of an electrical machine.
A blockage detector for detecting a blocked state of an electrical machine, the blockage detector comprising:
An inverter controller which is set up to generate a first control signal for an inverter for operating an electrical machine at a first rotating field speed and is also set up to generate a second control signal for the inverter for operating the electrical machine at a second rotating field speed,
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A method for detecting a blocked state of an electrical machine, wherein the method comprising the following steps:
A brushless DC motor having an inverter controller operable to generate a first control signal for the inventor to operate the motor at a first rotating field speed and a second control signal for the inverter to operate the motor at a second rotating field speed, wherein the inventor controller includes a blockage detector comprising a first power determiner for determining a first power consumption of the motor while a first phase voltage for operating the motor at the first rotating field speed is applied to the motor;
Dependencies are inferred from the claim text.