How to choose oscilloscope voltage probes for motor drive measurements?
When selecting oscilloscope voltage probes for motor drive measurements, it is important to consider: Motor drive measurements involve relatively high voltages. For example, the DC bus voltage in a 480 Vac three-phase motor drive is typically around 680 Vdc.
How to measure time & frequency using oscilloscope?
You can measure time and frequency quite easily using the horizontal scale on your oscilloscope. If you want to ensure accuracy when taking a frequency measurement, it helps to increase the signal area on your oscilloscope display – making it bigger so you can more easily translate the waveform.
Where can I find time measurements on Tektronix oscilloscopes?
On Tektronix oscilloscopes, you can find the time measurements under the ‘measurements’ badge on the display. This will give you an accurate, live reading of the frequency, which will change depending on the signal being transmitted. You can also access all statistic data.
How does a digital oscilloscope work?
On most, if not all, modern digital oscilloscopes the calculation is done for you, so you’ll be able to get a frequency reading whilst you’re measuring voltage. Simply press a couple of buttons to see the frequency of the signal you’re trying to inspect, as well as other statistics such as standard deviation and the mean frequency.
What probes can be used on a tpp1000 oscilloscope?
You can use TPP1000 passive probes or high voltage differential probes, such as THDP0200 or THDP0100, depending on the motor output power and noise levels. On the 5 or 6 Series MSO you can also use TLP58 logic probes on any oscilloscope channel to measure the sensor output pulses.
What is a Tektronix 8-channel MSO oscilloscope?
This primer illustrates these measurements on a Tektronix 8-channel, 5 Series B MSO Oscilloscope, equipped with Inverter Motor Drive Analysis software which enables stable, accurate measurements on PWM waveforms. Most modern motor drive systems use some form of modulation to control the frequency and therefore the speed of a motor.
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Sic Inverter Measurement Example Of the six switching devices (SiC MOSFET) in the three-phase inverter, a pair of upper and lower arms for the gate- ... Signal Oscilloscope with high-frequency differential probes produces accurate simultaneous measurements for each voltage signal of the inverter internal circuit. This results
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A high sample rate helps prevent aliasing, which occurs when an oscilloscope undersamples a signal with high-frequency components. Incorrect representation of the signal leads to measurement errors. To accurately reconstruct and display a signal on the oscilloscope''s screen, you need enough data points within each waveform period.
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To measure frequency with a digital multimeter, you''ll need an instrument with a frequency measurement function. First, prepare the digital multimeter to measure frequency. Select "Hz" with the function switch or knob. Once the digital display indicates "Hz," you''ve selected the frequency measurement function.
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This figure of merit is frequency-dependent, generally falling with increasing frequency. How to use a differential probe. Let''s look at using a high-voltage differential probe to measure the upper gate to source voltage in a 120 …
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This primer describes methods for making measurements using inverter, motor and drive analysis software on oscilloscopes to provide stable, accurate electrical measurements on the inputs, DC buses, and outputs of …
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This research presents a three-level flying capacitor resonant pole inverter (FC RPI) configuration that combines high output power and high switching frequency with reduced switch voltage stress.
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Try using a single/falling rising trigger on your pwm waveform channel to freeze …
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High-frequency/Low-Z Passive Probes (50-Ω terminated) Model Bandwidth Attenuation Ratio Input Impedance 4 Compensation Range Notes; N2874A: 1.5 GHz: 10:1: ... Measure: You can analyze the signal using the oscilloscope''s …
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Multi-Channel Measurement Applications. High Voltage Switching Motor/Inverter Circuits Development The high-definition oscilloscope DLM3000HD is ideal for measuring fast switching of inverters. It measures four channels simultaneously up to 2.5 GS/s with bandwidths up to 500 MHz and provides high-precision analysis with 12-bit resolution.
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The requirements for measuring instantaneous power of a switching power circuit using a digital storage oscilloscope are discussed. The measurements are difficult to perform and involve the use of ...
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In this paper, iron loss characterization using a GaNFET inverter controlled by a …
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It is the frequency at which the amplitude of the displayed sine wave is attenuated to 70.7% of the original signal amplitude. When measuring high-frequency or fast rise-time signals, oscilloscope bandwidth is especially critical. Without adequate bandwidth, an oscilloscope will not be able to display and measure high-frequency changes.
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Measuring the ripple with an oscilloscope. An oscilloscope performs ripple measurements (see Figure 1). At high levels, this choice is not the best. The cables that lead to the oscilloscope tips form a loop. The probe and ground conductors create a parasitic inductance that negatively affects the signal to be measured.
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Signal Oscilloscope with high-frequency differential probes produces accurate …
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To read an example of measuring inverter efficiency, click here. Voltage. Voltage measurements are impacted by the method of connecting the signal to the measurement device. High voltage signals may be connected directly with safety rated cables, or by using a voltage probe, either single ended or differential.
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With the right probes, they can measure with high bandwidth over wide ranges. Special 3-phase inverter motor drive analysis software enables fast, repeatable analysis. ... A line ripple measurement gives the RMS value at the configured line frequency, and peak to peak of the time domain waveform for the configured phases and a Switching Ripple ...
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PWM inverter system Regenerative-power capability ... it is generally necessary to calibrate any probe attached to an oscilloscope measuring data. ... state for the record that these findings do not mean that an oscilloscope with high input …
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It is the frequency at which the amplitude of the displayed sine wave is attenuated to 70.7% of the original signal amplitude. When measuring high-frequency or fast rise-time signals, oscilloscope bandwidth is especially critical. Without adequate bandwidth, an oscilloscope will not be able to display and measure high-frequency changes.
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Every voltage measurement is inherently a differential measurement. When the test point to be measured is referenced to equipment ground, things are simplified a bit. Since the oscilloscope chassis is tied to ground, a voltage measurement at such a test point may sometimes be safely made with a single-ended probe, which also references
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To measure frequency with an oscilloscope, follow these steps: Connect the Signal: Connect the input probe of your oscilloscope to the signal source you want to measure. Set Up the Oscilloscope: Turn on your …
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the output frequency to less than 100MHz, making frequency measurements less expensive and more feasible. This white paper demonstrates a practical, low cost, and high throughput method for measuring ring oscillator frequency. Introduction Short gate-delay times allow transistors to process data faster and improve overall circuit performance.
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The inverter-based ring shown in Figure 2 merits three remarks. First, since the delay of an inverter falls as the supply voltage V DD increases, the oscillation frequency f 0 is inverse - ly proportional to V DD. This supply sensitivity, K VDD, proves serious as noise on V DD directly modulates the output frequency. Second, for a total load ...
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If the waveform shown is steady, my frequency estimate would seem to say that something has gone wrong with the frequency measurement shown on screen. It also shows that the inverter''s frequency is fine. I don''t know what is happening with the frequency measurement that the oscilloscope is doing.
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