To provide an electric drive type work vehicle capable of obtaining acceleration equal to or higher than that of a torque converter vehicle in acceleration after modulation.SOLUTION: An electric drive type wheel loader 30 comprising: a power-generation electric motor 5 mechanically connected with an engine 1; a power-generation inverter 6 that, on the basis of a power-generation voltage command, controls an amount of power generated by the power-generation electric motor 5; a traveling electric motor 7 that drives a vehicle body; a traveling invert 8 that controls torque of the traveling electric motor 7 on the basis of the electric motor torque command; and a forward/backward movement switch 103 that switches between forward movement and backward movement of the vehicle body, further comprises: a brake resistor 3; a chopper circuit 4 that electrically connects the power-generation inverter 6 and the traveling inverter 8 to the brake resistor 3 when an input voltage exceeds a brake set voltage Vb; and a main controller 100 which outputs the power-generation voltage command for generating a voltage V2 exceeding the brake set voltage Vb to the power-generation inverter 6 during a modulating operation of the wheel loader 30.SELECTED DRAWING: Figure 2
【課題】モジュレート後の加速においてトルコン車と同等以上の加速が得られる電動駆動式作業車両を提供すること。【解決手段】エンジン1と機械的に接続した発電電動機5と、発電電圧指令に基づいて発電電動機5の発電量を制御する発電インバータ6と、車体を駆動する走行電動機7と、電動機トルク指令に基づいて走行電動機7のトルクを制御する走行インバータ8と、車体の前進/後進を切り替える前後進スイッチ103とを備える電動駆動式ホイールローダ30において、ブレーキ抵抗器3と、入力電圧がブレーキ設定電圧Vbを超えるとき発電インバータ6及び走行インバータ8をブレーキ抵抗器3に電気的に接続するチョッパ回路4と、ホイールローダ30がモジュレート動作する間、ブレーキ設定電圧Vbを超える電圧V2を発生する発電電圧指令を発電インバータ6に出力するメインコントローラ100とを備える。【選択図】 図2
ELECTRIC DRIVE TYPE WORK VEHICLE
電動駆動式作業車両
2019-03-14
Patent
Electronic Resource
Japanese
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / E02F Baggern , DREDGING / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
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