WT1800E是一台多功能型功率分析仪， 其精准的功率测量能力可以帮助研究人员、 设计师和工程师在能源效率、 节能和可再生能源领域内完成各种各样的测试应用。 无论是在节能设备/电器、 混合动力/电动汽车的生产领域， 还是在可再生能源技术领域， WT1800E都是可以完成电子测量和能源分析的通用型仪器。 主要应用包括:

• 电动汽车、 混合动力汽车、 插电式混合动力汽车
• 变频器、 电机和泵等工业设备
• 太阳能、 风能等可再生能源技术
• 空调、 冰箱等办公楼和家用电器
• 服务器、 路由器和交换机等IT数据中心设备
• 电池充电和便携设备
• 镇流器、 LED照明和荧光灯照明
• 飞机电源系统

变频器和电机测试

概览

电动及混合动力汽车有许多电子和机械部件， 因此， 整体性能评价需要对效率进行测量。 WT1800E可以执行6个功率输入的测量， 操作灵活且拥有宽带宽， 是测试和评估变频器输入和输出之间效率的理想工具。 通过选配电机评价功能， WT1800E可以测量转速和扭矩变化。

Delta运算

通过获取各单元的电压和电流瞬时测量值之和及之差，可以得出线电压和相电压。

• 在三相3线制系统中计算没有测量的线电压和相电流(图1)。
• 星形-三角形转换: 使用三相4线制数据根据相电压计算线电压。
• 三角形-星形转换: 在三相3线制(3V3A制)系统中根据线电压计算相电压(图2)。

WT1800E的优势

宽带宽和高速采样

WT1800E提供16位的高分辨率和2MHz采样，确保能以更高的精度测量更快的信号。

电机评价: 电角度/旋转方向测量

可以通过转速传感器或扭矩传感器的模拟/脉冲输入来测量电机的转速、 扭矩和输出(机械功率)。

谐波和双谐波测量

可以同时测量失真因数(如THD)、 基波和谐波成分。 即使在50ms的数据更新率下， 也可以测量高达500次的谐波。 用户还可以同时测量两个不同源的谐波。

电池充电和放电测量

通过积分测量， 可以对电池的充电和放电进行评估。 以2MS/s的高速采样率捕捉瞬时正值和负值。

线路滤波器可滤掉高频成分

在变频器波形的功率评价中， 测量值会受到高频成分的影响。 通过数字滤波器功能， 可以去除叠加在信号上的不必要的高频分。 每个输入单元都可以单独设置滤波器。 WT1800E标配1MHz、 300kHz的模拟滤波器和可以在100Hz～100kHz之间设置的数字滤波器(步进100Hz)。

可再生能源系统的效率

概述

光伏电池模块和风力涡轮机产生的能量通过功率调节器从直流电转换为交流电。 最大限度降低这些转换中的损耗， 可以提升整个能源系统的效率。 每台WT1800E能够提供最多6个通道的功率输入， 可以测量每个转换器之前和之后的电压、 电流、 功率和频率(交流)， 以及转换器效率和充电效率。

电池充电和放电测量

通过积分测量可对电池的充电和放电进行评估。 以大约2MS/s的高速采样率捕捉瞬时正值和负值， 分别进行积分并显示各总值。

WT1800E的优势

宽带宽和高速采样

WT1800E提供16位的高分辨率和2MHz采样， 确保能以更高的精度测量更快的信号。

谐波和双谐波测

在测试电机时， 需要在从低到高的各种转速下进行评估。 WT1800E支持0.1Hz的频率下限， 能够在电机转速极低的状态下测量谐波， 无需使用外部采样时钟

电机评价: 电角度/旋转方向测量

可以通过转速传感器或扭矩传感器的模拟/脉冲输出来测量电机的转速、 扭矩和输出(机械功率)。

NULL功能:调整每个输入的偏置

测试变频电机时， 环境噪声是一个普遍存在的问题。 这就意味着在测试开始之前测试值已不为零。 通过NULL功能， WT1800E可以分别启用、禁用或重置每个单元的电压、 电流和电机输入信号的偏置值。

DA输出和远程控制

在获取电压、 电流、 功率和效率等数据的同时，有时候可能需要检查数据与其它测量数据(温度等)一起的变化。 DA输出功能允许输出最多20个通道的模拟信号。

Electric and hybrid vehicles have many electronic and mechanical components. Therefore, the overall performance evaluation needs to measure the efficiency. The WT1800E can perform measurements on 6 power inputs, is flexible in operation and has a wide bandwidth, and is an ideal tool for testing and evaluating the efficiency between the input and output of the inverter. With the optional motor evaluation function, the WT1800E can measure speed and torque changes.

Delta calculation

By obtaining the sum and difference of the instantaneous measured values of voltage and current of each unit, the line voltage and phase voltage can be obtained.

• Calculate the unmeasured line voltage and phase current in a three-phase three-wire system (Figure 1).
• Star-delta conversion: Use three-phase 4-wire data to calculate the line voltage based on the phase voltage.
• Delta-star conversion: In a three-phase 3-wire (3V3A) system, the phase voltage is calculated based on the line voltage (Figure 2).

Advantages of WT1800E

Wide bandwidth and high speed sampling

The WT1800E provides 16-bit high resolution and 2MHz sampling to ensure that faster signals can be measured with higher accuracy.

Motor evaluation: electrical angle/rotation direction measurement

The rotational speed, torque and output (mechanical power) of the motor can be measured through the analog/pulse input of the rotational speed sensor or torque sensor.

Harmonic and dual harmonic measurement

The distortion factor (such as THD), fundamental wave and harmonic components can be measured simultaneously. Even at a data update rate of 50ms, harmonics up to the 500th order can be measured. Users can also measure harmonics from two different sources at the same time.

Battery charge and discharge measurement

Through integral measurement, the charge and discharge of the battery can be evaluated. Capture instantaneous positive and negative values at a high-speed sampling rate of 2MS/s.

Line filter can filter out high frequency components

In the power evaluation of the inverter waveform, the measured value will be affected by high frequency components. Through the digital filter function, unnecessary high frequency components superimposed on the signal can be removed. Each input unit can set the filter individually. The WT1800E comes standard with 1MHz, 300kHz analog filters and digital filters (100Hz steps) that can be set between 100Hz and 100kHz.

Renewable energy system efficiency

Overview

The energy generated by photovoltaic cell modules and wind turbines is converted from direct current to alternating current through a power conditioner. Minimizing the losses in these conversions can improve the efficiency of the entire energy system. Each WT1800E can provide up to 6 channels of power input, and can measure the voltage, current, power and frequency (AC) before and after each converter, as well as converter efficiency and charging efficiency.

Battery charge and discharge measurement

The charge and discharge of the battery can be evaluated through integral measurement. The instantaneous positive and negative values are captured at a high-speed sampling rate of approximately 2MS/s, integrated respectively, and each total value is displayed.

Advantages of WT1800E

Wide bandwidth and high speed sampling

The WT1800E provides 16-bit high resolution and 2MHz sampling to ensure that faster signals can be measured with higher accuracy.

Harmonic and double harmonic measurement

When testing a motor, it needs to be evaluated at various speeds from low to high. The WT1800E supports a frequency lower limit of 0.1Hz, which can measure harmonics at extremely low motor speeds without using an external sampling clock

Motor evaluation: electrical angle/rotation direction measurement

The rotational speed, torque and output (mechanical power) of the motor can be measured by the analog/pulse output of the rotational speed sensor or torque sensor.

NULL function: adjust the offset of each input

When testing variable frequency motors, environmental noise is a common problem. This means that the test value is not zero before the start of the test. Through the NULL function, the WT1800E can individually enable, disable or reset the voltage, current, and motor input signal offset values of each unit.

DA output and remote control

While acquiring data such as voltage, current, power, and efficiency, sometimes it may be necessary to check the changes in the data along with other measurement data (temperature, etc.). The DA output function allows the output of up to 20 channels of analog signals.