To evaluate a motor driven robot, power consumption to the motor and controller is measured while the speed is controlled through an action pattern as shown in the graph below. Design engineers need to measure inrush power, voltage and current over one pattern of repeated actions. The efficiency of mechanical output with respect to input power can be calculated. During actual operating conditions, The time to accelerate and decelerate the motor can be as short as several hundreds milliseconds to several seconds. As an inverter-driven motor rotates from stop to the top speed, the drive frequency changes from DC to several hundred Hz.
Performance required from power meter
Benefits for the user
The PX8000 is the world's first precision power scope, bringing oscilloscope-style time-based measurement to the world of power analyzers. With up to four channels, it can perform standard multi-phase power measurements. These measurements exist alongside oscilloscope-specific features such as cursor-based specific time period measurements to enable analysis of waveforms with transient components.
The PZ4000 is designed for High Frequency Power Measurements as well as Transient Power Measurements. Its real-time acquisition system can perform cycle-by-cycle power measurements. One to Four input elements offer Basic Power Accuracy of 0.2% with 2 MHz Bandwidth and 5MS/sec digitizing rates.