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US 12,752,640 B2Granted
Control system for a hybrid vehicle with a dual voltage direct current bus
AssigneeDeere & Company
InventorsReginald M. Bindl, Andrew W. Kelly
Life of this patent
Estimating the term…
Abstract
During a normal DC bus mode, the first DC node and the second DC node are configured to operate a lower voltage level on the primary direct current bus. In contrast, during a boost DC mode, the first DC node and the second DC node configured to operate a higher voltage level, which is higher than the lower voltage level, on the primary direct current bus.
Claims20
A control system for a hybrid vehicle comprising:
- an internal combustion engine configured to provide rotational energy via a rotatable engine shaft to one or more electric machines comprising a first electric machine and a second electric machine;
- a transmission configured to transmit the rotational energy between the engine shaft and a primary shaft or a secondary shaft, or to transmit the rotational energy between the engine shaft and both the primary shaft and the secondary shaft;
- a primary electric machine having a rotor coupled to the primary shaft;
- a secondary electric machine having a rotor coupled to the secondary shaft;
- a first inverter comprising a first alternating current node and a first direct current (DC) node, wherein the first alternating current node is coupled to the primary electric machine and wherein the first direct current node is coupled to a primary direct current bus;
- a second inverter comprising a second alternating current node and a second direct current node, wherein the second alternating current node is coupled to an electrical load and wherein the second direct current node is coupled to the primary direct current bus;
- during a normal DC bus mode, the first DC node and the second DC node configured to operate a lower voltage level on the primary direct current bus;
- during a boost DC mode, the first DC node and the second DC node configured to operate a higher voltage level that is higher than the lower voltage level;
- a rectifier coupled between electrical terminals of the secondary electric machine and a secondary DC bus;
- an isolation switch having switched terminals connected between the primary DC bus and the secondary DC bus;
- a sensor coupled to the second alternating current node to detect a current draw or power consumption sample of the electrical load during one or more sampling intervals;
- and
- a vehicle controller or electronic data processor configured:
- (a) to change the isolation switch to an open state and (b) to generate a control signal for the inverters to operate in the DC boost mode if the electronic data processor determines that the detected current draw exceeds a threshold current or that the detected power consumption exceeds a threshold power.
11 more elements
A control system for a hybrid vehicle comprising:
- an internal combustion engine configured to provide rotational energy via a rotatable engine shaft to one or more electric machines comprising a first electric machine and a second electric machine;
- a transmission configured to transmit the rotational energy between the engine shaft and a primary shaft or a secondary shaft, or to transmit the rotational energy between the engine shaft and both the primary shaft and the secondary shaft;
- a primary electric machine having a rotor coupled to the primary shaft;
- a secondary electric machine having a rotor coupled to the secondary shaft;
- a first inverter comprising a first alternating current node and a first direct current (DC) node, wherein the first alternating current node is coupled to the primary electric machine and wherein the first direct current node is coupled to a primary direct current bus;
- a second inverter comprising a second alternating current node and a second direct current node, wherein the second alternating current node is coupled to an electrical load and wherein the second direct current node is coupled to the primary direct current bus;
- during a normal DC bus mode, the first DC node and the second DC node configured to operate a lower voltage level on the primary direct current bus;
- during a boost DC mode, the first DC node and the second DC node configured to operate a higher voltage level that is higher than the lower voltage level;
- a rectifier coupled between electrical terminals of the secondary electric machine and a secondary DC bus;
- an isolation switch having switched terminals connected between the primary DC bus and the secondary DC bus;
- a sensor coupled to the second alternating current node to detect a current draw or power consumption sample of the electrical load during one or more sampling intervals;
- and
- a vehicle controller or electronic data processor configured:
- (a) to change the isolation switch to an open state and (b) to generate a control signal for the inverters to operate in the DC boost mode if the electronic data processor determines that an operator of the vehicle entered or selected an application rate or aggregate flow rate for a sprayer implement that exceeds a threshold application rate or threshold flow rate.
11 more elements
Dependencies are inferred from the claim text.