PWM Electronic Hammer
Electronic Hammer applying Electromagnetic Pulsative Vibration
Introduction of PWM Electronic Hammer
Differentiating from existing ‘air knocker(mechanical type)’, ‘gear hammer(mechanical type)’, ‘vibrating motor(electrical type)’ and ‘magnetic hammer(electrical type)’applied mono dynamic mechanism each, it is the genuine world first combined vibrator integrating electrical, electronic and mechanical multiple dynamic mechanism.
Work sites are drastically changing upon material properties like granularity, viscosity and weight demanded industry/technology development toward fine powder material handling and complicate process needs, However existing vibrators have been introduced to market 20 years ago and technology development and innovation haven’t caught up with industry work site demand.
Consequentially work sites have been faced with hundreds of predicaments naming productivity decline, labor cost increase resulting in production cost increase and damage to equipment by man powered hammering work resulting in maintenance time and cost increase both viciously cycling.
Sungil Hi-Tech PWM Electronic Hammer vibrator system is the right solution proving equipment characterized process improvement system avoiding and resolving cake and bridge phenomena.
Working Mechanism of
Driving Mechanism of Transducer
Like top left hand side picture, magnetic flux is generating when ‘E core’ and ‘I core’ are apart each other and electric current flows alternately on lead wire twined at ‘E core’.
This generated magnetic flux makes laminated steel sheets magnetized and ‘E core’ pulls ‘I core’ electromagnetically. If electric current is shut down, pulling force won’t be made and ‘E core’ and ‘I core’ shall be split. Repeating ‘full’ and ‘split’ over 60 turns within one second, Transducer is working.
Bottom left hand side picture shows Fleming’s left-hand rule presenting thumb is for power direction, index finger is for magnetic flux direction and middle finger is for electric current.
Fleming’s left-hand rule instructs that force is generated toward thumb direction when magnetic flux flows to index finger direction and electric current flows to middle finger. This generated force is called as electromagnetic force. This rule is the basic principle of Transducer.
In order to transform electromagnetic force to mechanical energy, it needs to fix ‘E core’ to steel spring and fix ‘I core’ to the below position of steel spring. Under the above core position setting and upon magnetic flux generated condition, mechanical vibration shall be made by the mechanism/process that electromagnetic force prevails and absorb tensile force and steel spring is returned to original position.
Introduction of PWM Electronic Hammer
Mechanical impact force of Transducer can be obtained when electric energy is provided to the coil of ‘E core’ periodically and intermittently. However, provided that proper driving algorithm isn’t applied, there will be a problem of over current at ‘E-I combined core’ and it is hard to obtain efficient kinetic energy.
In order to provide a solution to the above said inefficiency, Sungil Hi-Tech ingenious pulsative wave driving algorithm has been developed.
As shown in the right hand side pictures, waveform ‘S’ is original pulsative driving waveform of electronic hammer, waveform ‘D’ is an intermittent movement waveform for driving a specified section only. Should the applies and arithmetic logic operation to waveform (a) and (b), waveform (c) can be obtained. That is, a waveform acting only at ‘D’ section of waveform (b) is generated and deactivated at the balance ‘T’ section so that pulsative wave kinetic energy is generated by intermittent electric energy feeding to electronic hammer and consequentially vibration energy is generated at the section of pulse waveform coming.
Waveform (a) can be made by the PWM generation function of Micro Controller and waveform (b) can be made by outputport control method of Timer Interupter. Frequency, driving section and time of Sungil Hi-Tech PWM Electronic Hammer can be adjusted by user interface.
Features of PWM Electronic Hammer
(a) pulse waveform
(b) normal waveform
(c) amplification of ‘a’ pulse waveform
Pulsative wave is referred to irregular waveform by oscilloscope measuring. There is a difference in waveform between picture (a) pulse waveform and (b) normal waveform.
Sungil Hi-Tech PWM Electronic Hammer System is using natural vibration frequency so that equipment damage in hopper and electronic hammer itself is hardly expected even to a long time operation. To the contrary, other hammering systems using mono constant frequency may cause a damage. Further to equipment damage, mono constant frequency operating method may evoke more ‘cake’ and ‘bridge’ phenomena.
two(2) seconds motion and four(4) seconds pause setting
picture(a)
waveform measuring when PWM Electronic Hammer operated
picture(b)
enlarged graph of picture(a)
DRIVING GENERATOR TECHNICAL
Model (Unit) |
SMHL-02 | SMHL-03 | SMHL-04 | SMHL-06 | SMHL-08 | SMHL-09 |
---|---|---|---|---|---|---|
Frequency (Hz) |
50 and 60 both available | |||||
Voltage (Single Phase, V) |
AC220+10% | |||||
Transducer (Quantity Number) |
2 EA | 3 EA | 4 EA | 6 EA | 8 EA | 9 EA |
Consume Power (W) |
100 X 2 | 100 X 3 | 100 X 4 | 100 X 6 | 100 X 8 | 100 X 9 |
Transducer Frequency Range (Hz) |
30 ~ 60 Hz (setting tuned to resonance frequency) |
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Weight of Driving Generator |
Normal Type 15Kg (Explosion Proof Type 45Kg) |
20Kg | 25Kg | |||
Weight of Transducer |
15Kg per piece | |||||
Theoretical Transducer Frequenc |
35 ~ 60 Hz | |||||
Dimension of Driving Generator |
600 X 600 X 250 (mm) | 650 X 1,300 X 350 (mm) | ||||
Dimension of Transducer |
345 X 210 X 210 (mm) |
Model | Vibration Force (Kg) | Voltage (V) | Frequency (Hz) | Vibration per Minute (VPM) | Current (A) | Clamping Bolt | Weight (Kg) |
---|---|---|---|---|---|---|---|
SMH | 60 | 200/220 | 50/60 | 1,500/3,00 | 2A | M12 X 4 | 8 |
SMHL | 180 | 200/220 | 50/60 | 1,500/3,000 | 4A | M14 X 4 | 25 |
Sungil Hi-Tech PWM Electronic Hammer is performance intensified product through various installation and operation experiences. Differentiating with other hammering machines, it realizes advanced driving mechanism so that it is applicable to various powder, granular shape material treating lines and contributes to productivity enhancement and cost saving.
Performance Intensified Product | broad operation modes, simultaneous impact/vibration operation modes available. |
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Strong Points of Driving Generator | stability of power circuit and driving circuit, compact design of each circuit making maintenance easy |
Productivity Enhancement | productivity enhancement by preventing precipitation, adhesion, caking, bridging phenomena |
Applicable Work Sites | iron and steel making plant, powder handling plants, precision chemical plants and applicable to various powder and granular shape material handling lines |
Customized Services to Needs | – normal type/ anti-dust type/ explosion proof type ready to customers’ needs – cost saving effect by installation and commissioning period squeeze |