Welcome to the September 2022 issue of Amtech Newsletter. This month's newsletter includes Customer's voice; Application case study on Mono cable rope way in Mines Industry; Overview of DECS-150 with Motorized Variac; Overview of NextGen solutions for Pulp and paper plant; Techno-Talk on Speed Control of VFD Driven Motors apart from the most interesting talk from Desk of Managing Director. We hope you will find it interesting.

1. SEPTEMBER 2022
AN ISO 9001 : 2015 COMPANY
Official News Letter of Amtech Electronics (India) Ltd., Gandhinagar, Gujarat (India)
From the Desk of Managing Director
Inside
Training Calendar
Page 2
Appl. Case Study
Page 4
Monocable rope way
Amtech Power
Page 5
Product Overview
Page 6
NextGen Solutions for
Pulp and Paper Plant
Presence
Across the Nation
Page 8
Piyush Patel (M.D.)
Techno-Talk
Page 3
Speed Control Of VFD
Driven Motors
Customer’s Voice
Page 7
One positive
thought in you
can change
your whole life
DECS 150
with motorized Variac
Motor Control
Active Static VAR Compensator
AXPERT-EAZY+ AXPERT-VT 240S AXPERT-HIVERT MVD AXPERT-OPTI TORQUE
ACTIVE HARMONIC FILTER ACTIVE FRONT END CONVERTER STATCON: MULTI-FUNCTIONAL
ACTIVE STATIC VAR COMPENSATOR
TRACTION DRIVE WIND POWER CONVERTER HIGH VOLTAGE POWER SUPPLY
AN ISO 9001 : 2015 COMPANY
WIDEBAND HARMONIC FILTER
AXPERT-EAZY mini
MACHINE AUTOMATION LINE AUTOMATION PLANT AUTOMATION NETWORKING AUTOMATION
AXPERT-OPTI POWER SERIES
POWER CONTROLLER
Wideband Harmonic Filter
- Amtech Family
Happy NAVRATRI
Let us pray that the divine blessings of Goddess Durga
bring you eternal peace and happiness,
That they protect you from all
wrongdoing, and grant you all your wishes!
to you and your family!
Estimate The Enemy Intelligence
Here is the story which everyone of us may have heard. There was a man who
used to sell the caps. Once he was going to a town to sell the caps.
On the way he was tired and slept under a tree. When he woke up he found that
the bag in which he had kept the caps was empty, there was not a single cap
there!
He was surprised and started looking here and there. Suddenly he saw monkeys on the tree under
which he was sleeping. The monkeys were wearing his caps. Initially he tried to get the caps back from
the monkeys, by throwing stones at them. The monkeys in return started throwing fruits at him. Then
an idea came to his mind.
The cap seller looked at them, took the cap from his own head and threw it on the ground.
To his delight he found that monkeys also did the same thing and threw their caps on the ground. He
collected all the caps and went away.
Few years passed by. He used to tell this story about the monkeys to his son. When his son grew up,
he handed over the cap business to him. Once while his son was going to the town, same thing
happened to him.
When he got out of his sleep, under a tree, he saw that the monkeys are wearing the caps. But he
remembered his father's story. He looked at the monkeys and threw his cap on the ground. But he was
surprised to see that monkeys did not throw their caps on the ground!
He asked them “My father had told me that you will throw your caps, when I throw mine. Why you
didn't?” “We also have our father! We also have heard stories from them!”, replied the monkeys.
Never underestimate your opponent, he may also learn from the experience.
Always have alternate plans; the same trick may not work every time.
Sandeep Paper
Mills (P) Limited.

2. TRAINING CALENDAR
Product Portfolio:
Product training module:
ü About Amtech
ü VFD and AC Motor fundamentals
ü Physical familiarity of VFD and Soft Starter
ü Understanding the specifications, different
models, selecting the proper rating and
options provided for VFD and Soft Starter
ü Installation and Commissioning of VFD and
Soft Starter
ü Understanding of different applications of VFD
and Soft Starter
ü Trouble shooting of VFD and Soft Starter
ü
TM
Drive support software Axpert-Communicator
for PC
ENTER
GROUP
UP
LOC
REM
DOWN
NORM
ESC
MODE
FAULT
RUN
STOP
RESET
Hz
Sec
%
BYPASS V/I/T L/R/S S1
A
V
S0
S2
AXPERT
Electronic Soft Starter
A
V
ENTER
GROUP
UP
LOC
REM
DOWN
NORM
ESC
MODE
FAULT
RUN
STOP
RESET
Hz
Sec
%
BYPASS V/I/T L/R/S S1
A
V
S0
S2
AXPERT
Electronic Soft Starter
A
V
0.37...37 kW (0.5...50 HP)
200...240 V & 380...480 V
15...1065 A, 3.7...1000 kW (5...1340 HP)
200...690 V
200...12500 kW (270...16750 HP)
3.3 kV, 4.16 kV, 6.6 kV & 11 kV
400...600 V
60...300 A,
>300 A connect in parallel
20...1200 A, 7...1400 kW
200...690 V
0.75...2100 kW (1...2815 HP)
380...480 V, 500...600 V & 601...690 V
400...690 V
45...2100 kVA
400...600 V,
up to 12000 kVA
Active Static VAR Compensator
Customized as per requirements
ENGINEERED
SYSTEMS
AXPERT-OPTI POWER SERIES
POWER CONTROLLER
AXPERT-VT240S SERIES
VFD
+
AXPERT-EAZY SERIES
VFD
AXPERT-OPTI TORQUE SERIES
SOFT STARTER
AXPERT-HIVERT SERIES
MVD
Active Harmonic Filter
AXPERT- Series
Active Front-end Converter
AXPERT- Series
STATCON
AXPERT- Series
2022
2022
2022
2022
2022
2022
2022
2022
2022
2023
2023
2023
21-22
26-27
23-24
21-22
25-26
22-23
27-28
24-25
22-23
19-20
23-24
23-24

3. 3
TECHNO-TALK
TITLE : Speed Control Of VFD Driven Motors
Vector Control Methods
The basic premise of vector control, also referred to as field oriented control (FOC), is to transform a three-phase system
that is dependent on time and speed into a two-coordinate (d and q), time invariant system. It does this mathematically
through the use of a Clarke transform and a Park transform.
In AC motors there are two components to the stator current: the magnetizing current (d) and the torque-producing current
(q). The magnetizing current lags the voltage by 90 degrees, and the torque-producing current is in phase with the voltage.
With Field Oriented Control, these two current components are controlled independently each with its own PI controller.
This allows the torque-producing component (q), to be kept orthogonal to the rotor flux for maximum torque production and
therefore, optimum speed & torque control.
When an encoder is used in conjunction with a vector drive to provide shaft position feedback, the system is referred to as
closed-loop. Information regarding the shaft position allows the controller to determine if the torque output is incorrect. That
is, if the shaft overshoots the desired position, then too much torque is being applied, and vice-versa. Based on shaft
position, the voltage can be adjusted to increase or decrease the torque, regardless of motor speed.
Open-Loop Vector Control
Like scalar methods, vector VFD control methods can be open-loop or closed-loop.
Open-loop vector control, also referred to as sensor-less vector control, uses a mathematical model of the motor operating
parameters, rather than using a physical feedback device.
The controller monitors voltage and current from the motor and compares them to the mathematical model. It then corrects
any errors by adjusting the current supplied to the motor, which adjusts the motor’s torque production accordingly.
With sensor-less vector control, it’s important to have a very accurate mathematical model of the motor, and the controller
must be tuned for proper operation.
In this context, “open-loop” is a misnomer. The system is actually closed-loop, but the feedback information comes from
within the VFD itself instead of from an external encoder. Therefore, open-loop vector drives are also referred to as “sensor-
less” vector drives.
Closed-loop vector control uses an encoder to provide shaft position feedback, and this information is sent to the controller,
which adjusts the supplied voltage to increase or decrease torque. This is the only method that allows direct torque control
in all four quadrants of motor operation for dynamic braking or regeneration.
Benefits Of Vector Control
Vector control methods are more complex than scalar VFD control methods, but they offer significant benefits over scalar
methods in some applications. For example, open-loop vector control enables the motor to produce high torque at low
speeds, and close-loop vector control allows a motor to produce up to 200 percent of its rated torque at zero speed, useful
for holding loads at standstill. Close-loop vector control also provides very accurate torque and speed control for industrial
applications.
Open-loop vector control provides tighter speed control, higher starting torque, and higher low-speed torque than simple
V/Hz control, and does so without adding significant cost. It also allows four quadrant torque limit and is beneficial for impact
loads without having necessity of using encoder.
Adrawback to open-loop vector control is that it has difficulty monitoring current and therefore making torque adjustments at
very low motor speeds.
Also, motor shaft does not respond accurately and auto tuning is needed for better accuracy.
For this reason, open-loop control is not recommended for applications that require holding a load at standstill. It can,
however, produce 100 percent of rated torque at speeds down to about 8 Hz, so it is sufficient for most applications that
require high torque at low speeds.
The most significant benefit of close-loop vector control is that it allows up to 200 percent of the motor’s rated torque to be
produced at 0 rpm. This is especially useful in applications that require holding a load at standstill, such as cranes and
hoists.Also, Four Quadrant torque is available. Close-loop vector control is also very similar to servo control, since the shaft
encoder can provide accurate travel feedback.
Close-loop vector control is required in processes where error accumulation should be avoided such as web applications in
the printing and converting industry.

4. APPLICATION CASE STUDY
Are you looking for energy saving in application like Mono cable rope
way on IM motor?
Application : Mono cable rope way
Industry : Mines
Limitation of previous system:
Ÿ In the previous arrangement, the motors were operated through VFD and were stopped through
dynamic braking system which resulted in heavy energy loss.
Ÿ It was not possible to operate the rope way above 31 Hz, speed was a limiting factor.
Ÿ Drive used to trip frequently due to high amount of regeneration.
Ÿ More Bucket loading time resulting in less rope way output.
Ÿ Economical operation by reducing power consumption
of rope way.
Ÿ Rope way output is very less compared to capacity.
Ÿ Frequent tripping of the drive due to very heavy
regeneration.
Ÿ Unable to operate rope way above 31 Hz .
CHALLENGES SOLUTIONS
Ÿ AMTECH has supplied and commissioned 4Q drive to
get over the problem of frequent tripping and prevent the
wastage of regenerative energy.
Ÿ Use of 4Q drive has resulted in increase of rope way
output by 50 %.
Ÿ System runs smoothly as regenerative energy is
diverted to another load.
Ÿ It is possible to operate rope way at 46 Hz, considerably
higher then the previous case.
AMTECH offers highly reliable Axpert system.
Mono cable rope way is generally used for various
types of transport systems being qualified as Rope
Way. The 11 km long mono cable rope way being
discussed in this particular case is situated at an
unloading station of a mountain.
Capacity of this mono cable rope way is 150TPH
Benefits:
Ÿ Rope way output increased to 135 bucket / Hour (74Ton / Hour) from 90 bucket / Hour (49Ton / Hour)
Ÿ There is energy saving of more than 20 kW.
Ÿ Adequate motor protection.
Ÿ Smooth operation results in increased life of mechanical and electrical parts.

5. AMTECH POWER PRODUCT OVERVIEW
A COMPLETE ELECTRICAL SOLUTION PROVIDER FOR POWER PLANT
DECS 150 WITH MOTORIZED VARIAC
RedundantAVR system refers to the backup system, i.e., twoAVRs used (master-
slave combination).Two types of redundant systems exist:
1) Cold redundant
2) Hot redundant
1) Cold redundancy is for non-critical processes where time is not a high priority
and human intervention is acceptable. In this system if there is any failure occur
then manually we have replace that faulty part and start again.
2) Hot redundancy offers instant process correction when a failure is detected. In
this system there will be one standby system which will always follow the main
controller so, in case any failure happen then standby system will take over.
Using a motorized variac to control the DECS-150 output is an example of cold
redundancy, as human intervention is possible here.
Motor driven variacs are operated to maintain output voltage regulation as shown
in figure. This scheme can handle heavy surge currents frequently used in
industrial setting due to high surge capability.
The above figure shows the single phase motorized variac to be used for the
DECS-150.The DECS-150 output is to be controlled.
Series Winding
Output
Voltage
Sensing
Motor
Input

6. 6
PRODUCT OVERVIEW
The Covid-19 pandemic has put us all in very tragic situation. The way of working has changed. In this situation, it
is very important to have access of your plant from the remote. Our NextGen solutions are best fit for the current
situation.
The NextGen solutions are focused on, Maximizing Up time & productivity, Energy & Cost reduction, Consistent
highest product quality, Enhancing efficiency & profitability and Optimizing use of resources.
Our solutions are energy efficient, improves power factor and reduces harmonics. You are rest assured that
there will not be any penalty from the state electricity board.
The use of IIoT and Industry 4.0 gives total control in your mobile or desktop. Now it is easy to monitor and control
your plant from remote (your office or home) as all the data are just finger tip away.
Amtech an Indian Multinational, for over 35 years has been providing Total Solutions in motor control
automation, power quality & energy conservation and industrial electronics to its most discerning clients in the
paper industries. It is located in Gandhinagar, Gujarat.
For more information visit or write to
www.amtechelectronics.com info@amtechelectronics.com
NextGen Solutions for Pulp and Paper Plant

7. 7
CUSTOMER’S VOICE

8. Gandhinagar
Atlanta
Gandhinagar
Ahmedabad
Mumbai
Surat
Muzaffarnagar
Delhi
(Gurgaon)
Vadodara
Indore
Jamnagar
Udaipur
Kolkata
Nagpur
Pune
Hyderabad
Vapi Raipur
Bhopal
Jamshedpur
Jaipur
Lucknow
Vizag
Bangalore
Chennai
Belgaum
Pondicherry
Trichy
Aurangabad
Nasik
Chandigarh
Veraval
Coimbatore
M. D. Kamath
Paresh Patel
Regional Offices
Contact Person Phone No. (O) Mobile No. E-mail
022-28846083
Vrajesh Yadav 09819900501
09108051977
09825042458
mumbai@amtechelectronics.com
bangalore@amtechelectronics.com
delhi@amtechelectronics.com
Mumbai
Bangalore
Chennai
Delhi
T. S. Sridhar 09840618533 09940229955
.
chennai@amtechelectronics.com
Paresh Patel 09589074310
Indore mp@amtechelectronics.com
H.O. and Service Center
Contact Person Phone No. (O) Mobile No. E-mail
Rachana Patel 09825234505
H.O. Gandhinagar sales@amtechelectronics.com
079-23289101-102-103
Rajesh Moradiya 09909973780
Amtech Service Center
Gandhinagar
csd@amtechelectronics.com
079-23289101-102-103
G. Sateesh Kumar 09573900222
Hyderabad hyderabad@amtechelectronics.com
Kaushik C. 09932820680
Kolkata kolkata@amtechelectronics.com
09825042458
09589074310
09573900222
09932820680
09108051977
Pankaj Gulati 09888748620
Chandigarh delhi@amtechelectronics.com
09888748620
.
Naresh Gurao 09923044757
Raipur & Nagpur cg@amtechelectronics.com
09923044757