Pitch motor drive circuit which can operate in emergency mode
First Claim
1. Pitch drive circuit which can operate in emergency mode for a wind or water turbine system, comprising:
- at least one rectifier unit,at least one DC intermediate circuit,a first inverter unit and a pitch three-phase motor with motor trains that can be contacted on both sides, where a first contact side of the motor trains is connected to the first inverter unit, a second contact side of the motor trains is connected to a second inverter unit and at least one switching element is connected to at least one contact side of the motor trains, so that during normal operation of a first switching state of the switching element the motor trains can be supplied with current by both inverter units, and in an emergency operation of a second switching state of the switching element the motor trains can be supplied with current by a single inverter unit,wherein each converter unit is switchably connected via one decoupling switching element to the supply network, and each inverter unit is switchably connected via at least one decoupling switching element to the motor trains of a contact side, and both inverter units are connected to a braking chopper unit.
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Accused Products
Abstract
A pitch drive circuit that operates in an emergency mode, for a wind or water power plant. The circuit has at least one rectifier unit, at least one DC intermediate circuit, two inverter units and a pitch rotary current motor with motor trains that can be contacted on both sides. A first contact side of the motor trains is connected to a first inverter unit and a second contact side of the motor trains is connected to a second inverter unit. At least one switching element is connected to at least one contact side of the motor trains. In a normal operating mode of a first switching state of the switching element the motor trains can be energized via both inverter units, and in an emergency operating mode of a second switching state of the switching element, the motor trains can be energized via a single inverter unit.
20 Citations
14 Claims
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1. Pitch drive circuit which can operate in emergency mode for a wind or water turbine system, comprising:
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at least one rectifier unit, at least one DC intermediate circuit, a first inverter unit and a pitch three-phase motor with motor trains that can be contacted on both sides, where a first contact side of the motor trains is connected to the first inverter unit, a second contact side of the motor trains is connected to a second inverter unit and at least one switching element is connected to at least one contact side of the motor trains, so that during normal operation of a first switching state of the switching element the motor trains can be supplied with current by both inverter units, and in an emergency operation of a second switching state of the switching element the motor trains can be supplied with current by a single inverter unit, wherein each converter unit is switchably connected via one decoupling switching element to the supply network, and each inverter unit is switchably connected via at least one decoupling switching element to the motor trains of a contact side, and both inverter units are connected to a braking chopper unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification