# US 9,475,397 B2 · Electronic power converter for a mobile working machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,475,397 B2 - Document ID: US9475397B2 - Status: Granted - Kind: B2 - Application number: 14/165,768 - Filed: 2014-01-28 - Published: 2015-07-30 - Granted: 2016-10-25 - Earliest claimed: 2014-01-28 - Assignees: Visedo Oy - Applicants: Visedo Oy - Inventors: Antti Tarkiainen - Web page: https://patentgrep.com/patent/US9475397B2 ## CPC - B60L 50/16: with provision for separate direct mechanical propulsion - B60L 50/15: with additional electric power supply (with capacitors charged by engine-driven generators B60L50/40; with batteries charged by engine-driven generators B60L50/61) - B60L 2200/40: Working vehicles - B60L 2240/547: Voltage - B60L 2240/549: Current - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An electronic power converter includes a storage circuit (101) capable of storing electrical energy that is determined by an electrical quantity, voltage or current, of the storage circuit. The electronic power converter includes an electronic power converter stage (102) connected to the storage circuit and a regulator (103) for controlling the electronic power converter stage to regulate the electrical quantity at least partly on the basis of deviation of the electrical quantity from its reference level. The regulator is configured to weight the deviation with a first gain coefficient when the deviation is positive, and to weight the deviation with a second gain coefficient when the deviation is negative. The first gain coefficient has a value different from that of the second gain coefficient because the reference level is typically not in the middle of the allowed range of variation of the electrical quantity. ## Claims ### Claim 1 An electronic power converter for an electromechanical power transmission chain of a mobile working machine, the electronic power converter comprising: a storage circuit capable of storing electrical energy, the stored electrical energy being determined by a first electrical quantity related to the storage circuit, a first electronic power converter stage connected to the storage circuit, and a regulator for controlling the first electronic power converter stage to regulate the first electrical quantity at least partly on the basis of deviation of the first electrical quantity from a reference level, wherein the regulator is configured to weight the deviation with a first gain coefficient when the deviation is positive, and to weight the deviation with a second gain coefficient when the deviation is negative, the first gain coefficient having a value different from that of the second gain coefficient so as to allow the reference level of the first electrical quantity to deviate from a middle of an allowed range of variation of the first electrical quantity. ### Claim 2 (depends on 1) An electronic power converter according to claim 1, wherein the regulator is configured to control the first electronic power converter stage to regulate the first electrical quantity at least partly on the basis of a time integral of the deviation. ### Claim 3 (depends on 2) An electronic power converter according to claim 2, wherein the regulator is configured to weight the time integral of the deviation with a first integration coefficient when the deviation is positive, and to weight the time integral of the deviation with a second integration coefficient when the deviation is negative. ### Claim 4 (depends on 1) An electronic power converter according to claim 1, wherein the regulator is configured to control the first electronic power converter stage to regulate the first electrical quantity at least partly on the basis of a rate of change of the deviation. ### Claim 5 (depends on 4) An electronic power converter according to claim 4, wherein the regulator is configured to weight the rate of change of the deviation with a first rate coefficient when the deviation is positive, and to weight the rate of change of the deviation with a second rate coefficient when the deviation is negative. ### Claim 6 (depends on 1) An electronic power converter according to claim 1, wherein the regulator is configured to control the first electronic power converter stage to regulate the first electrical quantity at least partly on the basis of electrical power transferred between the storage circuit and an electrical system loading the electronic power converter. ### Claim 7 (depends on 1) An electronic power converter according to claim 1, wherein the regulator is configured to control the first electronic power converter stage to regulate the first electrical quantity at least partly on the basis of a second electrical quantity, a product of the first and second electrical quantities being electrical power transferred between the storage circuit and an electrical system loading the electronic power converter. ### Claim 8 (depends on 1) An electronic power converter according to claim 1, wherein the electronic power converter comprises a second electronic power converter stage connected to the storage circuit, the second electronic power converter stage being configured to transfer electrical power between i) the storage circuit and ii) an electrical system loading the electronic power converter. ### Claim 9 (depends on 1) An electronic power converter according to claim 1, wherein the storage circuit is a capacitive circuit and the first electrical quantity is voltage of the capacitive circuit, the electrical energy stored by storage circuit being directly proportional to the square of the first electrical quantity. ### Claim 10 (depends on 1) An electronic power converter according to claim 1, wherein the storage circuit is a capacitive circuit and the first electrical quantity is the square of voltage of the capacitive circuit, the electrical energy stored by storage circuit being directly proportional to the first electrical quantity. ### Claim 11 (depends on 1) An electronic power converter according to claim 1, wherein the storage circuit is an inductive circuit and the first electrical quantity is current of the inductive circuit. ### Claim 12 A mobile working machine comprising: a combustion engine, and an electromechanical power transmission chain between the combustion engine and one or more actuators of the mobile working machine, wherein the electromechanical transmission chain comprises at least one electronic power converter that comprises: a storage circuit capable of storing electrical energy, the stored electrical energy being determined by a first electrical quantity related to the storage circuit, a first electronic power converter stage connected to the storage circuit, and a regulator for controlling the first electronic power converter stage to regulate the first electrical quantity at least partly on the basis of deviation of the first electrical quantity from a reference level, wherein the regulator is configured to weight the deviation with a first gain coefficient when the deviation is positive, and to weight the deviation with a second gain coefficient when the deviation is negative, the first gain coefficient having a value different from that of the second gain coefficient so as to allow the reference level of the first electrical quantity to deviate from a middle of an allowed range of variation of the first electrical quantity. ### Claim 13 A method for controlling an electronic power converter that comprises: a storage circuit capable of storing electrical energy, the stored electrical energy being determined by a first electrical quantity related to the storage circuit, and a first electronic power converter stage connected to the storage circuit, the method comprising: controlling the first electronic power converter stage to regulate the first electrical quantity at least partly on the basis of deviation of the first electrical quantity from a reference level, weighting the deviation with a first gain coefficient when the deviation is positive, and weighting the deviation with a second gain coefficient when the deviation is negative, the first gain coefficient having a value different from that of the second gain coefficient so as to allow the reference level of the first electrical quantity to deviate from a middle of an allowed range of variation of the first electrical quantity. ### Claim 14 A non-transitory computer readable medium encoded with a computer program for controlling an electronic power converter that comprises: a storage circuit capable of storing electrical energy, the stored electrical energy being determined by a first electrical quantity related to the storage circuit, and a first electronic power converter stage connected to the storage circuit, the computer program comprising computer executable instructions for controlling a programmable processor to: control the first electronic power converter stage to regulate the first electrical quantity at least partly on the basis of deviation of the first electrical quantity from a reference level, weight the deviation with a first gain coefficient when the deviation is positive, and weight the deviation with a second gain coefficient when the deviation is negative, the first gain coefficient having a value different from that of the second gain coefficient so as to allow the reference level of the first electrical quantity to deviate from a middle of an allowed range of variation of the first electrical quantity.