# US 2014/0195085 A1 · 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 2014/0195085 A1 - Document ID: US20140195085A1 - Status: Published application - Kind: A1 - Application number: 14/147,953 - Filed: 2014-01-06 - Published: 2014-07-10 - Earliest claimed: 2013-01-04 - Assignees: Visedo Oy - Applicants: Visedo Oy - Inventors: Kimmo RAUMA; Antti TARKIAINEN - Web page: https://patentgrep.com/patent/US20140195085A1 ## CPC - B60L 3/00: Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption (methods or circuit arrangements for monitoring or controlling batteries or fuel cells B60L58/00) - 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 50/16: with provision for separate direct mechanical propulsion - B60L 58/10: for monitoring or controlling batteries - B60W 20/13: in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion - B60L 2200/40: Working vehicles - B60L 2240/423: Torque - B60L 2240/441: Speed - B60L 2240/443: Torque - B60L 2240/547: Voltage - Y02T 10/64: Electric machine technologies in electromobility - 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 - Y10S 903/93: Conjoint control of different elements - 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 - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A mobile working machine includes an energy source (101), a storage circuit (103) for storing electrical energy, a first electronic power converter stage (104) between the storage circuit and the energy source, an electrical machine (106) for driving actuators, a second electronic power converter stage (107) between the storage circuit and the electrical machine, and a control system (108) for controlling the first electronic power converter stage responsive to the power taken by the second electronic power converter stage from the storage circuit, the control system providing a control signal path from the storage circuit to the first electronic power converter stage. The signal processing properties of the control signal path are dependent on the electrical energy stored by the storage circuit in order to allow the electrical energy to vary, but within desired limits, so as to reduce the peak power taken from the energy source. ## Claims ### Claim 1 A mobile working machine comprising: an energy source for supplying electrical energy, a storage circuit for storing electrical energy, a first electronic power converter stage connected between the energy source and the storage circuit, an electrical machine for driving one or more actuators of the mobile working machine, a second electronic power converter stage connected between the storage circuit and the electrical machine, and a control system for controlling the first electronic power converter stage to respond to fluctuation of power taken by the second electronic power converter stage from the storage circuit, the control system providing a control signal path from the storage circuit to the first electronic power converter stage, wherein at least one signal processing property of the control signal path is arranged to be dependent on the electrical energy stored by the storage circuit so that a control of the electrical energy is slower to respond to changes of the power taken by the second electronic power converter stage when the electrical energy has a first value that is between second and third values than when the electrical energy has either one of the second and third values. ### Claim 2 (depends on 1) A mobile working machine according to claim 1, wherein the control signal path comprises a controllable filter and the control system is arranged to increase a bandwidth of the controllable filter in response to a situation in which the electrical energy gets farther from a reference value of the electrical energy. ### Claim 3 (depends on 2) A mobile working machine according to claim 2, wherein the control signal path comprises a proportional and integrative regulator in series with the controllable filter. ### Claim 4 (depends on 1) A mobile working machine according to claim 1, wherein the control signal path is asymmetric so that the control signal path has different signal processing properties when the electrical energy is below a reference value of the electrical energy than when the electrical energy is above the reference value of the electrical energy. ### Claim 5 (depends on 1) A mobile working machine according to claim 1, wherein the control signal path has different signal processing properties when the electrical energy is within a pre-determined range than when the electrical energy is outside the predetermined range, the first value belonging to the pre-determined range and the second and third values being outside the pre-determined range. ### Claim 6 (depends on 1) A mobile working machine according to claim 1, wherein the storage circuit is a capacitive circuit and the electrical energy stored by storage circuit is directly proportional to the square of voltage of the capacitive circuit. ### Claim 7 (depends on 6) A mobile working machine according to claim 6, wherein the capacitive circuit comprises an electric double layer capacitor. ### Claim 8 (depends on 1) A mobile working machine according to claim 1, wherein the storage circuit is an inductive circuit and the electrical energy stored by storage circuit being directly proportional to the square of current of the inductive circuit. ### Claim 9 (depends on 1) A mobile working machine according to claim 1, wherein the energy source comprises a combustion engine and a generator connected between the combustion engine and the first electronic power converter stage. ### Claim 10 (depends on 9) A mobile working machine according to claim 9, wherein the working machine comprises a controller configured to start the combustion engine in response to a situation in which the electrical energy stored by the storage circuit goes below a first pre-determined limit. ### Claim 11 (depends on 9) A mobile working machine according to claim 9, wherein the working machine comprises a controller configured to stop the combustion engine in response to a situation in which the electrical energy stored by the storage circuit exceeds a second pre-determined limit. ### Claim 12 A method for reducing a peak power taken out from an energy source of a mobile working machine, the mobile working machine comprising: a storage circuit for storing electrical energy, a first electronic power converter stage connected between the storage circuit and the energy source of the mobile working machine, an electrical machine for driving one or more actuators of the mobile working machine, a second electronic power converter stage connected between the storage circuit and the electrical machine, and a control system for controlling the first electronic power converter stage to respond to fluctuation of power taken by the second electronic power converter stage from the storage circuit, the control system providing a control signal path from the storage circuit to the first electronic power converter stage, wherein the method comprises changing at least one signal processing property of the control signal path on the basis of the electrical energy stored by the storage circuit so that a control of the electrical energy is slower to respond to changes of the power taken by the second electronic power converter stage when the electrical energy has a first value that is between second and third values than when the electrical energy has either one of the second and third values. ### Claim 13 A non-transitory computer readable medium encoded with a computer program for reducing a peak power taken out from an energy source of a mobile working machine, the mobile working machine comprising: a storage circuit for storing electrical energy, a first electronic power converter stage connected between the storage circuit and the energy source of the mobile working machine, an electrical machine for driving one or more actuators of the mobile working machine, a second electronic power converter stage connected between the storage circuit and the electrical machine, and a control system for controlling the first electronic power converter stage to respond to fluctuation of power taken by the second electronic power converter stage from the storage circuit, the control system providing a control signal path from the storage circuit to the first electronic power converter stage, characterized in that the computer program comprises computer executable instructions for controlling a programmable processor to change at least one signal processing property of the control signal path on the basis of the electrical energy stored by the storage circuit so that a control of the electrical energy is slower to respond to changes of the power taken by the second electronic power converter stage when the electrical energy has a first value that is between second and third values than when the electrical energy has either one of the second and third values.