Product support home page for pmcs motion control cards. It operates on the principle that the torque is exerted on the moving coil placed in the field of the permanent magnet. Construction of pmmc instruments the constructional features of this instrument are shown in fig. When a current carrying coil is placed in the magnetic field produced by permanent magnet, the coil experiences a force and moves. Permanent magnet moving coil or pmmc instrument definition. Pmi abbreviation stands for power management instruments. Pmmc instruments, galvanometer, dc voltmeter, dc ammeter. The instruments which use the permanent magnet for creating the stationary magnetic field between which the coil moves is known as the permanent magnet moving coil or pmmc instrument. Ppt project management professional pmp powerpoint. Constructional features of pmmc enameled or silk covered copper wire is used for coil 5. The moving coil is wound with many turns of enameled or silk covered copper wire. Permanent magnet moving coil or pmmc instruments are the most accurate type for the measurement of dc current or voltage. Level gaugesswitchesmagneticreflex, bicolor, boiler level gauge.
If you want to see the real scope, check out a few of the large, webbased employment. What is the abbreviation for power management instruments. Permanent magnet moving coil pmmc instruments to measure dc current or dc voltage can be used for measuring ac currents and voltages by introducing additional circuit and proper calibration 4. This could of use for college going students, gate aspirants, and. The pmmc stands for permanent magnet moving coil and it is also called as darsonval instruments. This video is intended to explain the very basics of a pmmc instrument. What is permanent magnet moving coil or pmmc instrument. Permanent magnet moving coil instruments pmmc the permanent magnet moving coil instruments are most accurate type for direct current measurements.
Electrical instruments ppt video online download 38 repulsion or doubleiron type movingiron instrument. The action of these instruments is based on the motoring principle. A permanent magnet is used to produce magnetic flux and a coil that carries the current. The coil is mounted on rectangular aluminum former, which is pivoted on jeweled bearings. Project management professional pmp certification study guide a free powerpoint ppt presentation displayed as a flash slide show on id. The working principle of pmmc instruments are same as that of darsonaval type of galvanometer, difference being that a direct reading instrument is provided with pointer and scale. Get the latest updates here for your motion controller including mauals, firmware, and application programs. Prof avishek chatterjee department of electrical engineering iit kharagpur. Measuring instruments ppt video online download 31 pmmc instruments. Working principle and construction of pmmc polytechnic hub. Pmmc meter are most accurate instrument for dc measurement however they are unable to measure the ac quantity. Plz wait for 30 seconds till the quality gets better.
A permanent magnet moving coil pmmc meter also known as a d arsonval meter or galvanometer is an instrument that allows you to measure the current through a coil by observing the coils angular deflection in a uniform magnetic field. Pmmc instruments explained in hindi english subtitles. Pmmc instruments construction and working principle. The coils move freely in the field of a permanent magnet. Classification, absolute and secondary instruments, indicating instruments, control, balancing and damping, constructional details, characteristics, errors in measurement, ammeters, voltmeters. Electrical and electronics instruments moving iron instruments attraction type repulsion type moving iron instruments electrodynamometer type wattmeter power measurement in 3 phase 3.
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