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US 12,580,506 B2Granted
Generator, control device, and control method
AssigneeHonda Motor Co., Ltd.
InventorKenji Shibata
Life of this patent
Estimating the term…
Abstract
A generator configured to supply power to a load, including an engine, an alternator configured to be driven by the engine and to output AC power, a converter configured to convert the AC power output from the alternator into DC power, an inverter configured to convert the DC power converted by the converter into AC power and to supply the AC power to the load, and a control unit configured to variably control a value of a voltage output from the converter according to the load.
Claims10
A generator configured to supply power to a load, comprising:
- an engine;
- an alternator configured to be driven by the engine and to output AC power;
- a converter configured to convert the AC power output from the alternator into DC power;
- an inverter configured to convert the DC power converted by the converter into AC power and to supply the AC power to the load;
- a control unit configured to variably control a value of a voltage output from the converter according to the load;
- and
- a DC link connected between the converter and the inverter and configured to input the DC power converted by the converter to the inverter,
- wherein the control unit
- sets a rotation speed in the engine according to the load, controls the rotation speed in the engine so as to drive the engine at a low rotation speed when the load is a light load and so as to drive the engine at a high rotation speed when the load is a high load, and changes the rotation speed in a curved manner when driving the engine between the low rotation speed and the high rotation speed,
- variably controls a value of a DC link voltage of the DC link as a value of a voltage output from the converter, sets the value of the DC link voltage to be low when the load is the light load and sets the value of the DC link voltage to be high when the load is the high load, and
- sets the value of the DC link voltage to be low and a value of a current to be high when a margin of power output from the alternator for the load is low and the engine drives at the low rotation speed, sets the value of the DC link voltage to be high and the value of a current to be high when the margin of power output from the alternator for the load is high and the engine drives at the low rotation speed, sets the value of the DC link voltage to be low and the value of a current to be low when the margin of power output from the alternator for the load is low and the engine drives at the high rotation speed, and sets the value of the DC link voltage to be high and the value of the current to be low when the margin of power output from the alternator for the load is high and the engine drives at the high rotation speed, and wherein
- a variable amount of the DC link voltage when the margin of power output from the alternator for the load is high is greater than a variable amount of the DC link voltage when the margin of power output from the alternator for the load is low, and a variable amount of the current when the margin of power output from the alternator for the load is high is greater than a variable amount of the current when the margin of power output from the alternator for the load is low.
9 more elements
A control device configured to control a generator including:
- an engine;
- an alternator configured to be driven by the engine and to output AC power;
- a converter configured to convert the AC power output from the alternator into DC power;
- an inverter configured to convert the DC power converted by the converter into AC power and to supply the AC power to a load;
- and a DC link connected between the converter and the inverter and configured to input the DC power converted by the converter to the inverter, comprising
- a control unit configured to variably control a value of a voltage output from the converter according to the load,
- wherein the control unit
- sets a rotation speed in the engine according to the load, controls the rotation speed in the engine so as to drive the engine at a low rotation speed when the load is a light load and so as to drive the engine at a high rotation speed when the load is a high load, and changes the rotation speed in a curved manner when driving the engine between the low rotation speed and the high rotation speed,
- variably controls a value of a DC link voltage of the DC link as a value of a voltage output from the converter, sets the value of the DC link voltage to be low when the load is the light load and sets the value of the DC link voltage to be high when the load is the high load, and
- sets the value of the DC link voltage to be low and a value of a current to be high when a margin of power output from the alternator for the load is low and the engine drives at the low rotation speed, sets the value of the DC link voltage to be high and the value of a current to be high when the margin of power output from the alternator for the load is high and the engine drives at the low rotation speed, sets the value of the DC link voltage to be low and the value of a current to be low when the margin of power output from the alternator for the load is low and the engine drives at the high rotation speed, and sets the value of the DC link voltage to be high and the value of the current to be low when the margin of power output from the alternator for the load is high and the engine drives at the high rotation speed, and wherein
- a variable amount of the DC link voltage when the margin of power output from the alternator for the load is high is greater than a variable amount of the DC link voltage when the margin of power output from the alternator for the load is low, and a variable amount of the current when the margin of power output from the alternator for the load is high is greater than a variable amount of the current when the margin of power output from the alternator for the load is low.
8 more elements
A control method for controlling a generator including:
- an engine;
- an alternator configured to be driven by the engine and to output AC power;
- a converter configured to convert the AC power output from the alternator into DC power;
- an inverter configured to convert the DC power converted by the converter into AC power and to supply the AC power to a load;
- and a DC link connected between the converter and the inverter and configured to input the DC power converted by the converter to the inverter, comprising
- a control step of variably controlling a value of a voltage output from the converter according to the load,
- wherein the control step,
- sets a rotation speed in the engine according to the load, controls the rotation speed in the engine so as to drive the engine at a low rotation speed when the load is a light load and so as to drive the engine at a high rotation speed when the load is a high load, and changes the rotation speed in a curved manner when driving the engine between the low rotation speed and the high rotation speed,
- variably controls a value of a DC link voltage of the DC link as a value of a voltage output from the converter, sets the value of the DC link voltage to be low when the load is the light load and sets the value of the DC link voltage to be high when the load is the high load, and
- sets the value of the DC link voltage to be low and a value of a current to be high when a margin of power output from the alternator for the load is low and the engine drives at the low rotation speed, sets the value of the DC link voltage to be high and the value of a current to be high when the margin of power output from the alternator for the load is high and the engine drives at the low rotation speed, sets the value of the DC link voltage to be low and the value of a current to be low when the margin of power output from the alternator for the load is low and the engine drives at the high rotation speed, and sets the value of the DC link voltage to be high and the value of the current to be low when the margin of power output from the alternator for the load is high and the engine drives at the high rotation speed, and wherein
- a variable amount of the DC link voltage when the margin of power output from the alternator for the load is high is greater than a variable amount of the DC link voltage when the margin of power output from the alternator for the load is low, and a variable amount of the current when the margin of power output from the alternator for the load is high is greater than a variable amount of the current when the margin of power output from the alternator for the load is low.
8 more elements
Dependencies are inferred from the claim text.