Hybrid type construction machine
First Claim
1. A hybrid construction machine comprising:
- a lower running body;
an upper turning body mounted on the lower running body through a turning device;
a motor generator system connected to an internal combustion engine and performing a motor generator operation, said motor generator system including a first inverter and a motor generator driven by an alternating current output by the first inverter;
an electric power accumulation system connected to said motor generator system, said electric power accumulation system including an electric power accumulator, a DC bus, and an up-down direct current voltage converter that is disposed between the electric power accumulator and the DC bus;
a load drive system connected to said electric power accumulation system and being driven electrically, said load drive system including a second inverter and a turning electric motor that is contained in said turning device and that is driven by an alternating current output by the second inverter;
an abnormality detection part operatively connected to said motor generator system, said electric power accumulation system and said load drive system; and
a main control part determining whether an abnormality has occurred based on a detection value of said abnormality detection part,wherein said abnormality detection part detects an abnormality in said motor generator system, said electric power accumulation system, and said load drive system,wherein said abnormality detection part determines that an abnormality has occurred, and said main control part stops a drive of one of said motor generator of said motor generator system, said up-down direct current voltage converter of said electric power accumulation system and said turning electric motor of said load drive system, in which the abnormality is detected, after said abnormality detection part determines that the abnormality has occurred, and continues or stops a drive of each of the other of said motor generator of said motor generator system, said up-down direct current voltage converter of said electric power accumulation system and said turning electric motor of said load drive system, in which a lack of the abnormality has occurred, in accordance with the one of said motor generator system, said electric power accumulation system and said load drive system, in which the abnormality is detected,wherein said main control part continues driving said electric power accumulation system when an abnormality is detected in said motor generator system, andwherein the hybrid construction machine further comprises a work element driven by a hydraulic pressure generated by a drive force of said internal combustion engine or said motor generator, and an electric work element which is driven electrically, and wherein, when an abnormality of said electric power accumulation system is detected by said abnormality detection part, said main control part stops driving said electric work element.
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Accused Products
Abstract
A hybrid-type construction machine includes: a motor generator system connected to an internal combustion engine and performing a motor generator operation; an electric power accumulation system connected to the motor generator system; a load drive system connected to the electric power accumulation system and being driven electrically; an abnormality detection part equipped to the motor generator system, the electric power accumulation system and the load drive system; and a main control part determining whether an abnormality has occurred based on a detection value of the abnormality detection part. When the abnormality determination part determines that an abnormality has occurred, the main control part stops a drive of a drive system in which the abnormality is detected in the load drive system.
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Citations
15 Claims
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1. A hybrid construction machine comprising:
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a lower running body; an upper turning body mounted on the lower running body through a turning device; a motor generator system connected to an internal combustion engine and performing a motor generator operation, said motor generator system including a first inverter and a motor generator driven by an alternating current output by the first inverter; an electric power accumulation system connected to said motor generator system, said electric power accumulation system including an electric power accumulator, a DC bus, and an up-down direct current voltage converter that is disposed between the electric power accumulator and the DC bus; a load drive system connected to said electric power accumulation system and being driven electrically, said load drive system including a second inverter and a turning electric motor that is contained in said turning device and that is driven by an alternating current output by the second inverter; an abnormality detection part operatively connected to said motor generator system, said electric power accumulation system and said load drive system; and a main control part determining whether an abnormality has occurred based on a detection value of said abnormality detection part, wherein said abnormality detection part detects an abnormality in said motor generator system, said electric power accumulation system, and said load drive system, wherein said abnormality detection part determines that an abnormality has occurred, and said main control part stops a drive of one of said motor generator of said motor generator system, said up-down direct current voltage converter of said electric power accumulation system and said turning electric motor of said load drive system, in which the abnormality is detected, after said abnormality detection part determines that the abnormality has occurred, and continues or stops a drive of each of the other of said motor generator of said motor generator system, said up-down direct current voltage converter of said electric power accumulation system and said turning electric motor of said load drive system, in which a lack of the abnormality has occurred, in accordance with the one of said motor generator system, said electric power accumulation system and said load drive system, in which the abnormality is detected, wherein said main control part continues driving said electric power accumulation system when an abnormality is detected in said motor generator system, and wherein the hybrid construction machine further comprises a work element driven by a hydraulic pressure generated by a drive force of said internal combustion engine or said motor generator, and an electric work element which is driven electrically, and wherein, when an abnormality of said electric power accumulation system is detected by said abnormality detection part, said main control part stops driving said electric work element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A hybrid construction machine comprising:
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a lower running body; an upper turning body mounted on the lower running body through a turning device; a motor generator system connected to an internal combustion engine and performing a motor generator operation, said motor generator system including a first inverter and a motor generator driven by an alternating current output by the first inverter; an electric power accumulation system connected to said motor generator system, said electric power accumulation system including an electric power accumulator, a DC bus, and an up-down direct current voltage converter that is disposed between the electric power accumulator and the DC bus; a load drive system connected to said electric power accumulation system and being driven electrically, said load drive system including a second inverter and a turning electric motor that is contained in said turning device and that is driven by an alternating current output by the second inverter; an abnormality detection part operatively connected to said motor generator system, said electric power accumulation system and said load drive system; and a main control part determining whether an abnormality has occurred based on a detection value of said abnormality detection part, wherein said abnormality detection part detects an abnormality in said motor generator system, said electric power accumulation system, and said load drive system, wherein said abnormality detection part determines that an abnormality has occurred, and said main control part stops a drive of one of said motor generator of said motor generator system, said up-down direct current voltage converter of said electric power accumulation system and said turning electric motor of said load drive system, in which the abnormality is detected, after said abnormality detection part determines that the abnormality has occurred, and continues or stops a drive of each of the other of said motor generator of said motor generator system, said up-down direct current voltage converter of said electric power accumulation system and said turning electric motor of said load drive system, in which a lack of the abnormality has occurred, in accordance with the one of said motor generator system, said electric power accumulation system and said load drive system, in which the abnormality is detected, wherein said main control part continues driving said motor generator system and said electric power accumulation system when an abnormality is detected in said load drive system, and wherein said DC bus is connected with said electric power accumulation system, said load drive system and said motor generator system, and wherein said main control part performs a control of said electric power accumulation system so that a voltage value of said DC bus becomes a previously determined target value after a determination of an abnormality of said motor generator system or said load drive system is made by said abnormality detection part, and wherein the hybrid construction machine further comprises a charge voltage value detection part detecting a charge voltage value of said electric power accumulator, and wherein, when the charge voltage value detected by said charge voltage value detection part is apart from a previously determined range. - View Dependent Claims (14)
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15. A hybrid construction machine comprising:
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a lower running body; an upper turning body mounted on the lower running body through a turning device; a motor generator system connected to an internal combustion engine and performing a motor generator operation, said motor generator system including a first inverter and a motor generator driven by an alternating current output by the first inverter; an electric power accumulation system connected to said motor generator system, said electric power accumulation system including an electric power accumulator, a DC bus, and an up-down direct current voltage converter that is disposed between the electric power accumulator and the DC bus; a load drive system connected to said electric power accumulation system and being driven electrically, said load drive system including a second inverter and a turning electric motor that is contained in said turning device and that is driven by an alternating current output by the second inverter; an abnormality detection part operatively connected to said motor generator system, said electric power accumulation system and said load drive system; and a main control part determining whether an abnormality has occurred based on a detection value of said abnormality detection part, wherein said abnormality detection part detects an abnormality in said motor generator system, said electric power accumulation system, and said load drive system, wherein said abnormality detection part determines that an abnormality has occurred, and said main control part stops a drive of one of said motor generator of said motor generator system, said up-down direct current voltage converter of said electric power accumulation system and said turning electric motor of said load drive system, in which the abnormality is detected, after said abnormality detection part determines that the abnormality has occurred, and continues or stops a drive of each of the other of said motor generator of said motor generator system, said up-down direct current voltage converter of said electric power accumulation system and said turning electric motor of said load drive system, in which a lack of the abnormality has occurred, in accordance with the one of said motor generator system, said electric power accumulation system and said load drive system, in which the abnormality is detected, wherein said main control part continues driving said motor generator system and said electric power accumulation system when an abnormality is detected in said load drive system, and wherein said DC bus is connected with said electric power accumulation system, said load drive system and said motor generator system, and wherein said main control part performs a control of said electric power accumulation system so that a voltage value of said DC bus becomes a previously determined target value after a determination of an abnormality of said motor generator system or said load drive system is made by said abnormality detection part, and wherein the hybrid construction machine further comprises a work element driven by a hydraulic pressure generated by a drive force of said internal combustion engine or said motor generator, and an electric work element which is driven electrically, and wherein, when an abnormality of said electric power accumulation system is detected by said abnormality detection part, said main control part stops driving said electric work element.
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Specification