Since different machines have different frequency and voltage requirements, a circuit known as a converter is used to convert AC current from the power grid to a DC current, and then an inverter is used to convert the DC current to an AC current with the frequency and voltage required by the machinery being driven.
High-resolution, accurate, isolated phase current measurement is vital in automotive traction inverter applications, where high-performance torque and motion control are required. The options available for phase-current measurement are to use Hall-effect sensors, flux-gate sensors, current transformers, and shunt resistors.
Since the waveform’s frequency varies on the secondary side of the inverter, it’s necessary to take the fundamental wave’s frequency range into account when choosing a voltmeter and current meter. Inverters can be used to control motor speed in a fine-grained manner by converting DC to AC.
Using variant B, the current is measured at the emitter of the bottom IGBT of each arm in a three-phase inverter. It is possible to dispense with a third current measurement; this can be derived by calculation based on the two measured current signals.
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This article focuses on current measurement methods that require relatively high accuracy and bandwidth, such as those used to measure current on the input of computer/telecom boards, …
Abstract—The control of very high switching frequency power electronic converter systems featuring latest generation wide bandgap (WBG) devices requires current …
The current generated by the inverter can be used to power various electrical devices that require an AC source. This article discusses the types of inverter current, factors that affect inverter …
This TI Design provides a reference solution for accuracy, high linearity, and the galvanic isolation required for current measurement in three-phase inverters using closed-loop …
A further potential for cost reduction is the introduction of shunts for current measurement internal to the power modules, replacing Hall-effect sensors measuring the AC …
This article focuses on current measurement methods that require relatively high accuracy and bandwidth, such as those used to measure current on …
High-precision DC/AC signal simultaneous measurement and power/efficiency measurement Large-current and high-voltage model available (up to 50A, 1000V) Testing of …
In modern industrial applications even low-cost drives have excellent dynamic behavior, which is achieved by field-oriented control combined with high-dynamic current …
The current generated by the inverter can be used to power various electrical devices that require an AC source. This article …
What is an inverter? Inverters are used in a variety of settings where they’re needed to drive equipment ranging from electric products to large industrial machinery by varying the speed of …
1 System Description High-resolution, accurate, isolated phase current measurement is vital in automotive traction inverter applications, where high-performance …
Power measurements are made by measuring the RMS current and voltage and applying the formula P = VrmsArms. Complete guide here.
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