IS215ACLEH1A GE 燃机卡DCS控制模块工控行业应用系统

IS215ACLEH1A GE 燃机卡DCS控制模块工控行业应用系统

不同的速度会导致机械共振，并且应该在电机的工作范围之外识别和编程这些速度。

选购变频器时应考虑加装滤波装置，尽量减少电气系统出现电能质量问题。

电气考虑：

配电系统的标称电源电压通常高于变频器铭牌电压，以允许从配电变压器到使用点的电压降。

单相驱动器具有 120 和 240 伏的标准化电压。三相电机的标准化电压为 200、230、460 和 575 伏。

电机考虑：

PWM VFD 的应用会导致电压瞬变远高于电机的额定电压，这会导致绝缘系统在很短的时间内发生故障。

许多 VFD 允许用户调整开关频率。该频率可以在 500 Hz 至 20 kHz 的宽范围内进行调整。开关频率定义了一定时间内电机上发生电压过冲的次数。

使用较低范围的频率。

环境问题：

必须选择 VFD 以确保它们有足够的保护免受其环境条件的影响。

VFD 通常与其他电气设备一起安装在电气外壳中，或者作为独立单元安装在自己的外壳中。

优点：

它可以限制扭矩

以受控的加速/减速启动和停止

降低维护成本

过程温度和压力的控制。

可以调整 VFD 以从静止到全速产生稳定的 150% 启动转矩

IS215ACLEH1A GE 燃机卡DCS控制模块工控行业应用系统

Different speeds cause mechanical resonance, and these speeds should be identified and programmed outside the operating range of the motor.

When purchasing a frequency converter, a filter device should be considered to minimize power quality problems in the electrical system.

Electrical considerations:

The nominal supply voltage of a distribution system is usually higher than the inverter nameplate voltage to allow for a voltage drop from the distribution transformer to the point of use.

Single-phase drivers have standardized voltages of 120 and 240 volts. The standardized voltages for three-phase motors are 200, 230, 460 and 575 volts.

Motor consideration:

The application of PWM VFDS can cause voltage transients much higher than the rated voltage of the motor, which can cause the insulation system to fail in a very short time.

Many VFDS allow the user to adjust the switching frequency. The frequency can be adjusted over a wide range from 500 Hz to 20 kHz. The switching frequency defines the number of voltage overshoots that occur on the motor within a certain time.

Use a lower range of frequencies.

Environmental issues:

VFDS must be selected to ensure that they have adequate protection from their environmental conditions.

The VFD is usually installed in an electrical housing with other electrical equipment, or as a stand-alone unit in its own housing.

Advantages:

It limits torque

Start and stop with controlled acceleration/deceleration

Reduce maintenance costs

Process temperature and pressure control.

The VFD can be adjusted to produce a stable 150% starting torque from rest to full speed

IS215ACLEH1A GE 燃机卡DCS控制模块工控行业应用系统

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