Inverter device and electric vehicle

The present invention addresses the problem of reducing output voltage errors of an inverter circuit and stably controlling a motor up to high-speed rotation. An inverter device (100) includes: a PWM controller (145) for generating a PWM pulse for converting a DC voltage into an AC voltage on the basis of a motor output demand; and an inverter circuit (110) for converting a DC voltage into an AC voltage according to the PWM pulse generated by the PWM controller (145), and driving a motor (300). The PWM controller (145) changes, when performing trapezoidal wave modulation using a trapezoidal wave in an overmodulation region, the pulse width of the PWM pulse at a predetermined timing at the upper side of the trapezoidal wave. 本发明的技术问题在于，降低逆变器电路的输出电压误差，将马达稳定地控制至高速旋转。逆变器装置(100)具备：PWM控制器(145)，其基于马达输出请求，生成用于将直流电压转换成交流电压的PWM脉冲；以及逆变器电路(110)，其通过由PWM控制器(145)生成的PWM脉冲，将直流电压转换成交流电压而驱动马达(300)。PWM控制器(145)当在过调制区域中进行使用梯形波的梯形波调制时，在梯形波的上边处的规定的定时下，使PWM脉冲的脉冲宽度变化。