EMHEATER VFDs (Single or 3-Phase Input and 3-Phase Output) include four G-Series models (G1, G13, G2, G3 and G5) and two Z-Series Servo models (Z1 and Z3).
Understanding Harmonics VSD Working Principle VSDs consist of three sub-systems: the Diode bridge converter, DC Bus, and IGBT output inverter. The Diode bridge input rectifier rectifies the incoming AC voltage into a DC voltage. The DC Bus system utilises DC … Continued
Understanding EMI Electromagnetic Interference (EMI) or Radio Frequency Interference (RFI) is electromagnetic signals that interfere with the normal operation of electrical equipment. EMI problems often result in poor equipment performance (contributing to a loss of serial communication, nuisance VSD trips, … Continued
VSD Leader-Follower Applications In the past machine ‘synchronisation’ were done by using one large electric motor with a long central line shaft and many belts and cams to mechanically fix different axes together. This design had many flaws with belts … Continued
VSD Constant Water Pressure Setup The pumping industry has seen a big uptake in the use of Variable Speed Drives (VSDs), which opened many possibilities in pumping system controls, including methods for controlling the discharge pressure in pumping systems. The Problem Water pressure … Continued
Porcelain Windings (Braking Resistors) TCGC offers the following EMHEATER VSD (380V) Porcelain Winding (Braking Resistor) products: VSD kW Braking Resistor Resistor Model 0.75 100W / 500Ω PW-100/500 1.5 300W / 400Ω PW-300/400 2.2 500W / 250Ω PW-500/250 4 800W / 150Ω … Continued
Aluminium Housed Braking Resistors TCGC offers the following EMHEATER VSD (380V) Aluminium Housed Braking Resistor products: VSD (kW) Brake Unit Resistor 1.5 EMHEATER VSDs up to 22kW include built-in Braking Switches 480W / 220Ω 2.2 525W / 200Ω 4 850W / 130Ω … Continued
AC EMC/EMI Filters (Noise Filters) TCGC offers the following EMHEATER VSD AC EMC/EMI Filter products: Input Filters EM-FIT3 (3-Phase ~380V) EM-FIT5 (3-Phase ~525V) EM-FIT6 (3-Phase ~690V) Output Filters EM-FOT2 (3-Phase ~220V) EM-FOT3 (3-Phase ~380V) EM-FOT5 (3-Phase ~525V) EM-FOT6 (3-Phase ~690V) *Manufactured with Amp ratings according to specific requirement. … Continued
DC Chokes (Reactors) TCGC offers the following EMHEATER VSD DC Choke/Reactor products: EM-RAD2 (3-Phase ~220V) EM-RAD3 (3-Phase ~380V) EM-RAD5 (3-Phase ~525V) EM-RAD6 (3-Phase ~690V) *Manufactured with Amp ratings according to specific requirement. *Custom Voltage options and pricing available on request only. Installation of DC Bus/Link … Continued
Dynamic Braking Systems TCGC offers the following EMHEATER VSD Dynamic Braking System products: Brake Units EM-BU2: For 30~45kW Drives (Light Duty) – with matching resistor/s EM-BU3: For 55kW Drive (Light Duty) or 30~45kW Drives (Heavy Duty) – with matching resistor/s EM-BU3H: … Continued
Sine Wave Filters TCGC offers the following EMHEATER VSD Sine Wave Filters products: EM-SWF3 (3-Phase 380V) EM-SWF5 (3-Phase 525V) *From 0.75kW up to 630kW. *Manufactured with Amp ratings according to specific requirement. *Custom Voltage options and pricing available on request only. … Continued
AC Chokes (Reactors) TCGC offers the following EMHEATER VSD AC Choke/Reactor products: Input Chokes (Line Reactors): EM-RAI3 (3-Phase ~380V) EM-RAI5 (3-Phase ~525V) EM-RAI6 (3-Phase ~690V) Output Chokes (Load Reactors): EM-RAO2 (3-Phase ~220V) EM-RAO3 (3-Phase ~380V) EM-RAO5 (3-Phase ~525V) EM-RAO6 (3-Phase ~690V) *Manufactured with Amp ratings according to specific … Continued
VSD Peripherals TCGC offers the following EMHEATER VSD Peripheral products: DC Bus/Link Chokes/Reactors AC Chokes/Reactors (Input and Output) AC EMC/EMI Filters for Noise Disturbance (Input and Output) Sine Wave Filters Dynamic Braking Systems with: Porcelain Braking Resistors/Windings; or Aluminium Housed Braking … Continued
Single-Phase to 3-Phase Converters TCGC offers the following EMHEATER single-phase to 3-phase converter Variable Speed Drive models: G1: Single-Phase (220V) Input and 3-Phase (220V) Output G13: Single-Phase (220V) Input and 3-Phase (380V) Output TCGC offers the following EMHEATER single-phase to 3-phase converter Solar Drive … Continued
Variable Speed Drives TCGC offers the following EMHEATER Variable Speed Drive models: G Series: Vector Control Inverters for General Use: Single-Phase to 3-Phase Converters G1: Single-Phase (220V±15%) Input and 3-Phase (~220V) Output G13: Single-Phase (220V±15%) Input and 3-Phase (~380V) … Continued
VSD impact on Power Factor A Variable Speed Drive (VSD), delivers power from the source (typically the utility) to a motor in three basic steps: The Rectifier converts AC power to DC power; The DC Bus receives, smooths, and stores … Continued
What are VSDs Used for? VSDs can be set up to the requirements of various individual applications. Compared to Soft Starters, Variable Speed Drives (VSDs) offer much more flexibility in terms of features and settings and, depending on the application, … Continued
The EMHEATER Variable Speed Drives (VSDs) and Solar Drives include 35 types of warning/protection functions. In case of a fault, the protection function will be triggered, the inverter will stop output, and the faulty relay contact of the inverter will … Continued
How do Variable Speed Drives (VSDs) Work? AC induction motor speed depends on the number of motor poles and the frequency of the applied power. When operated from a constant frequency power source (typically 50Hz in South Africa), AC induction … Continued
What is the difference between Variable Frequency Drive’s (VFDs) and Variable Speed Drive’s (VSDs)? There are two primary methodologies for controlling electrical motors with subtle differences: – Variable Speed Drives (VSDs): Controls the speed of a motor by changing the … Continued
VSD vs Soft Starter Soft Starters utilise silicon-controlled rectifiers (SCRs) to perform phase angle control, while Variable Speed Drives (VSDs) use insulated-gate bipolar transistors (IGBTs) to perform pulse-width-modulation (PWM) control. VSD technology continues to evolve, while Soft Starters are considered … Continued
EMHEATER Business and Product Listing Platforms For EMHEATER business listings and adverts, please see the list of links to the various platforms below: Gumtree Variable Speed Drives Soft Starters Solar Drives (for Water Pumps) Single-Phase to 3-Phase Converters Braking Units … Continued
EMHEATER Social Media Platforms Following are links to all the Social Media Platforms used by EMHEATER South Africa:
Using VSDs for Lowering Costs The electric motors that drive pumps on irrigation systems are extremely energy-intensive, making irrigation systems one of the largest consumers of electricity on South African farms. Variable Speed Drives (VSDs) can reduce energy consumption at … Continued
Using VSDs for Lowering Costs By virtue of their energy intensiveness, heating, ventilation and air conditioning (HVAC) systems account for a large percentage of companies’ energy costs. Continued misuse can dramatically impact on the effectiveness of companies’ energy-saving projects and … Continued
Using VSDs for Lowering Costs Many applications in the oil, gas and petrochemical industries rely on motor driven pumps and pumping systems that are energy-intensive. Installing Variable Speed Drives (VSDs) on motor driven equipment can be an effective energy and … Continued
Using VSDs for Lowering Costs Because of the growing consciousness of the enormous challenges of feeding the world’s expanding population in future, the concepts “farm to the fork” and “farm for the future” are extremely important. Both concepts place the … Continued
New EM15 Series VSDs and Solar Drives TCGC is pleased to announce that we will be receiving our first shipment of the new EMHEATER EM15 Series VSDs and Solar Drives (replacing the previous EM12 Series) during November 2020. Below is … Continued
Single-Phase To 3-Phase Converters If you have a 3-Phase motor/device and do not have ready access to 3-Phase power, there are workarounds you can use to get your equipment properly powered. Numerous types of 3-Phase Converters are available. These units … Continued
Advantages of using a Variable Speed Drive (VSD) A Variable Speed Drive (VSD) is also called a Variable Frequency Drive (VFD), Adjustable Speed Drive, Adjustable Frequency Drive, AC Drive, Microdrive or Inverter. A VSD is a type of motor controller … Continued
Advantages of using a Solar Drive (for Water Pumps) Solar Drives for surface and borehole pumps are ideal for use in South Africa which gets plenty of sunshine. Solar Drives for water pumps are a popular choice for converting an … Continued
The NAMPO Harvest Day, which has been bringing agriculture together for almost six decades, has sadly for the first time had to be cancelled by organisers Grain SA, due to the COVID-19 pandemic. The show was postponed to August 2020 … Continued
Solar Drives Explained Solar Drives (for water pumps) provides an energy efficient, environmentally friendly way to pump water for a variety of purposes (Irrigation of land, domestic/community water supply, fish farming, livestock, swimming pool, fountain, drip irrigation & sprinkler, industrial … Continued
Die KragDag Ekspo wat jaarliks in Augustus gehou word (weens COVID-19 gaan dit in Desember wees hierdie jaar), is die hoogtepunt op die KragDag-kalender en bied ’n uitstalkas vir energie- en ander selfstandigheidsoplossings. Dit sluit ’n Opvoedkunde sub-ekspo, Entrepreneurskap en … Continued
The 2021 Africa Agri Tech Event Scheduled for 22 – 24 June 2021 Africa Agri Tech is the annual meeting point where the Southern African agricultural community gathers to explore the latest trends, scientific advances and technology solutions that will … Continued
New Event Dates The Solar Show Africa 2020 has been moved from 20-21 August to 4-5 November at the Sandton Convention Centre. https://www.terrapinn.com/exhibition/solar-show-africa/index.stm
EMHEATER – Variable Speed Drives (VSDs) EMHEATER Variable Speed Drive Product Intro Video… Manufacturers of Variable Speed Drives, Soft Starters, Solar Drives and Servo Drives/Motors. For more information regarding VSDs, please refer to the following related blog posts: What is … Continued
EMHEATER – Servo Drives EMHEATER Servo Drive Product Intro Video… Manufacturers of Variable Speed Drives, Soft Starters, Solar Drives and Servo Drives/Motors. For more information regarding Servo Systems, please refer to the following related blog posts: What is a Servo … Continued
Variable Speed Drives (VSDs) Explained Variable Speed Drives (VSDs) are also known as Adjustable Speed Drives, Variable Frequency Drives (VFDs), Adjustable Frequency Drives, Inverter Drives, Microdrives or AC Drives. These drives are an excellent method for controlling motor speed in … Continued
