Power boost regulator

Patent metadata

Field	Value
Publication number	US-2016339997-A1
Application number	US-201615160866-A
Country	US
Kind code	A1
Filing date	May 20, 2016
Priority date	May 22, 2015
Publication date	Nov 24, 2016
Grant date	—

Abstract

A power generation system is provided including a power boost regulator operative to provide load matched voltage operation of an AC power source.

First claim

What is claimed is:

1 . A method of electrical power generation in a vehicle, the method including:
receiving, by a power boost regulator, alternating current (AC) power from an AC generator coupled to an output of an engine of a vehicle; detecting a rotational speed of the engine; selecting, by an electronic controller of the power boost regulator, an operating point for the AC generator based on the detected engine speed and at least one operating parameter, the operating point being selected from a first operating point having a first voltage level and a first current level and a second operating point having a second voltage level and a second current level, wherein the AC generator is operative to provide the same power output level when operating at the first and second operating points; and controlling, by the power boost regulator, the AC generator to generate the AC power at the selected operating point.

2 . The method of claim 1 , wherein the first voltage level is less than the second voltage level and the first current level is greater than the second current level.

3 . The method of claim 2 , wherein the first and second voltage levels and the first and second current levels of the respective first and second operating points vary based on the detected engine speed.

4 . The method of claim 2 , wherein the first operating point is selected for detected engine speeds less than a threshold engine speed, further including changing the selected operating point of the AC generator from the first operating point to the second operating point in response to the detected engine speed exceeding the threshold engine speed.

5 . The method of claim 2 , wherein the at least one parameter includes a temperature level of at least one of the AC generator and the power boost regulator.

6 . The method of claim 5 , wherein the electronic controller selects the second operating point in response to the temperature level exceeding a threshold level.

7 . The method of claim 2 , wherein the at least one parameter includes a voltage limit of hardware of the power boost regulator.

8 . The method of claim 2 , further including receiving, by the electronic controller, user input identifying a selection of a mode of operation, the mode of operation including at least one of a first work mode and a second performance mode, in the first work mode the electronic controller is operative to increase the rotational speed of the engine in response to at least one of a vehicle speed being less than a threshold vehicle speed and a charge percentage of a battery of the vehicle being less than a threshold charge percentage.

9 . The method of claim 8 , wherein in the second performance mode the power boost regulator is operative to reduce a current draw on the AC power generator in response to at least one of an acceleration of the vehicle exceeding an acceleration threshold and an engine speed exceeding an engine speed threshold.

10 . The method of claim 1 , further including rectifying and boosting, by the power boost regulator, the AC power to provide boosted direct current (DC) power for use by an electrical system of the vehicle.

11 . The method of claim 1 , wherein the controlling includes driving a boost rectifier circuit of the power boost regulator to induce the AC generator to produce the AC power at the selected operating point, and the boost rectifier circuit includes a plurality of MOSFET devices operative to convert the AC power to the DC power and to boost the DC power and at least one pulse width modulation generator driving the plurality of MOSFET devices.

12 . A method of electrical power generation in a vehicle, the method including:
detecting a rotational speed of an engine of a vehicle; determining, by an electronic controller of a power boost regulator, a target load voltage and an actual load voltage of an electrical system of the vehicle; determining, by the electronic controller, a target current level and a target voltage level for a power output of an alternating current (AC) generator based on the target load voltage, the actual load voltage, and the rotational speed of the engine, the AC generator being coupled to a crankshaft of the engine; controlling, by the power boost regulator, the AC generator to generate the AC power at the target current level and the target voltage level; and regulating, by the power boost regulator, the AC power to provide boosted direct current (DC) power for use by the electrical system of the vehicle.

13 . The method of claim 12 , wherein the target current level and the target voltage level are selected to achieve a maximum power output of the AC generator for the detected rotational speed of the engine.

14 . The method of claim 13 , wherein the power boost regulator is operative to induce the maximum power output of the AC generator for all rotational speeds of the engine.

15 . The method of claim 12 , wherein the power boost regulator is operative to provide boosted DC power for rotational speeds of the engine that are at or below engine idle speed.

16 . The method of claim 12 , wherein the controlling includes driving a boost rectifier circuit of the power boost regulator to cause the AC generator to produce the AC power at the target voltage level and the target current level, and the boost rectifier circuit is operative to convert the AC power to the DC power.

17 . The method of claim 16 , wherein the boost rectifier circuit includes a plurality of MOSFET devices and at least one pulse width modulation generator driving the plurality of MOSFET devices.

18 . The method of claim 16 , further including distributing, by a power steering circuit of the power boost regulator, the DC power to a plurality of electrical loads of the vehicle based on a priority distribution scheme wherein a first electrical load receives power prior to a second electrical load receiving power.

19 . The method of claim 12 , further including accessing a lookup table stored in memory accessible by the electronic controller and setting a maximum threshold and a minimum threshold for the target current level for the detected engine speed using the lookup table.

20 . A vehicle for riding by a rider, the vehicle including:
a chassis; a front suspension coupled to the chassis; a pair of front skis coupled to the front suspension; an endless track assembly coupled to the chassis including an endless belt; a straddle seat supported by the chassis for supporting an operator; an engine supported by the chassis and providing power to the endless track assembly; an alternating current (AC) generator operative to generate AC power for an electrical system of a vehicle; and a power boost regulator operative to rectify the AC power and to boost the AC power to provide a boosted DC power output, the power boost regulator including an electronic controller in communication with the power boost regulator and operative to detect a rotational speed of the engine and to select an operating point for the AC generator based on the detected engine speed and at least one operating parameter, the operating point being selected from a first operating point having a first voltage level and a first current level and a second operating point having a second voltage level and a second current level, wherein the AC generator is operative to provide the same power output level when operating at the first and second operating points, wherein the power boost regulator is operative to control the

Assignees

• Polaris Inc

Inventors

• Crain Stephen G
• Hoffet Markus
• Erasmus Peter
• Stevens Joshua J
• Tharaldson Joseph D
• Teubner Brad W

Classifications

• B60L2200/22

  Microcars, e.g. golf cars · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• B62M27/02 Primary

  power driven · CPC title

• B60L2210/30

  AC to DC converters · CPC title

• B60L2240/441

  Speed · CPC title