Control apparatus for hybrid compressor
AssigneeZexel Corporation
InventorsMasahiko Tamegai, Kazuhiro Irie
Life of this patent
Estimating the term…
Abstract
In order to achieve a smooth shift between two drive sources, an electromagnetic clutch is engaged, when the rotation rate of the compression unit and the engine rotation rate match, to switch from motor drive to engine drive during engine startup or engine acceleration. The motor is driven before the electromagnetic clutch is cut off to switch from engine rive to motor drive during engine stop or engine deceleration.
Claims20
A control apparatus for a hybrid compressor comprising a rotary shaft, a compression unit having a compression space whose volumetric capacity is variable in response to rotation of the rotary shaft, an electromagnetic clutch that communicates rotation of an engine to the rotary shaft via a pulley, and a motor unit comprising a rotor and a stator, the rotor being secured to the rotary shaft and the stator facing opposite the rotor, the hybrid compressor being installed in an airconditioning system, said control apparatus comprising:
- an engine operation decision-maker that determines whether the engine is to stop operation;
- an airconditioning system operation decision-maker that determines whether the airconditioning system is required to operate;
- a motor unit driver that
- sets the motor unit into an ON state,
- drives the motor unit, and
- sets the motor unit into an OFF state;
- an electromagnetic clutch driver that
- sets the electromagnetic clutch into an ON state, thereby linking the pulley with the rotary shaft, and
- sets the electromagnetic clutch into an OFF state, thereby cutting off the pulley from the rotary shaft;
- an engine driver that drives the engine;
- and
- a stop controller, wherein said stop controller
- cuts off the linkage between the pulley and the rotary shaft by setting the electromagnetic clutch into the OFF state via said electromagnetic clutch driver, when the motor unit is in an ON state, and p2 stops driving of the engine via said engine driver, when said engine operation decision-maker determines that the engine is to stop operation and said airconditioning system operation decision-maker determines that the airconditioning system is required to operate.
A control apparatus for a hybrid compressor, the hybrid compressor comprising a rotary shaft, a compression unit having a compression space whose volumetric capacity is variable in response to rotation of the rotary shaft, an electromagnetic clutch that communicates rotation of an engine to the rotary shaft via a pulley, and a motor unit comprising a rotor and a stator, the rotor being secured to the rotary shaft and the stator facing opposite the rotor, the hybrid compressor being installed in an airconditioning system, said control apparatus comprising:
- an engine operation decision-maker that determines whether the engine is to stop operation,
- an airconditioning system operation decision-maker that determines whether the airconditioning system is required to operate;
- a motor unit driver that
- places the motor unit into an ON state,
- drives the motor unit, and
- places the motor unit into an OFF state;
- an electromagnetic clutch driver that
- places the electromagnetic clutch into an ON state, thereby linking the pulley with the rotary shaft, and
- places the electromagnetic clutch into an OFF state, thereby cutting off the pulley from the rotary shaft;
- an engine driver that drives the engine;
- a compression unit rotation rate detector that detects an actual rotation rate of the compression unit;
- an engine rotation rate detector that detects an actual rotation rate of the engine;
- an estimated rotation rate calculator that performs an arithmetic operation to determine an estimated rotation rate of the compression unit that corresponds to the actual rotation rate detected by said engine rotation rate detector;
- a target discharge quantity calculator that performs an arithmetic operation to determine the quantity of discharge achieved by the compression unit based upon a heat load factor;
- a motor target rotation rate setter that sets a motor target rotation rate for the compression unit to achieve via the motor unit based upon the target discharge quantity calculated by said target discharge quantity calculator;
- and
- an acceleration controller, wherein said acceleration controller
- sets the electromagnetic clutch into the ON state via said electromagnetic clutch driver to link the pulley and the rotary shaft, when the estimated rotation rate calculated by said estimated rotation rate calculator is equal to, or greater than, the actual rotation rate detected by said compression unit rotation rate detector, while the motor unit is driven by said motor unit driver, and while the electromagnetic clutch is set in an OFF state by said electromagnetic clutch driver, and
- sets the motor unit into an OFF state via said motor unit driver.
A control apparatus for a hybrid compressor, the hybrid compressor comprising a rotary shaft, a compression unit having a compression space whose volumetric capacity is variable in response to rotation of the rotary shaft, an electromagnetic clutch that communicates rotation of an engine to the rotary shaft via a pulley, and a motor unit comprising a rotor and a stator, the rotor being secured to the rotary shaft and the stator facing opposite the rotor, the hybrid compressor being installed in an airconditioning system, said control apparatus comprising:
- an engine operation decision-maker that determines whether the engine is to stop operation;
- an airconditioning system operation decision-maker that determines whether the airconditioning system is required to operate;
- a motor unit driver that
- places the motor unit into an ON state,
- drives the motor unit, and
- places the motor unit into an OFF state;
- an electromagnetic clutch driver that
- places the electromagnetic clutch into an ON state, thereby linking the pulley with the rotary shaft, and
- places the electromagnetic clutch into an OFF state, thereby cutting off the pulley from the rotary shaft;
- an engine driver that drives the engine;
- a compression unit rotation rate detector that detects an actual rotation rate of the compression unit;
- an engine rotation rate detector that detects an actual rotation rate of the engine;
- an estimated rotation rate calculator that performs an arithmetic operation to determine an estimated rotation rate of the compression unit that corresponds to the actual rotation rate detected by said engine rotation rate detector;
- a target discharge quantity calculator that performs an arithmetic operation to determine the quantity of discharge achieved by the compression unit based upon a heat load factor;
- a motor target rotation rate setter that sets a motor target rotation rate for the compression unit to achieve via the motor unit based upon the target discharge quantity calculated by said target discharge quantity calculator;
- and
- a deceleration controller, wherein said deceleration controller
- starts up the motor unit via said motor unit driver at a point in time at which the actual rotation rate detected by said compression unit rotation rate detector is equal to, or less than, the motor target rotation rate set by said motor target rotation rate setter, while the electromagnetic clutch is set in an ON state by said electromagnetic clutch driver, and while the motor unit is set in an OFF state by said motor unit driver, and
- cuts off the linkage between the pulley and the rotary shaft by setting the electromagnetic clutch into the OFF state via said electromagnetic clutch driver.
Dependencies are inferred from the claim text.